Friday, November 18, 2011

Would you walk a fish?

If your Koi has a mobile tank, would you take it for a walk?

Tuesday, November 1, 2011

Minecraft Koi Fish Mob

Check out this Minecraft mod that has Koi fish in it. Now you can build your very own Koi pond in the game. The Koi fish in the mod include Tancho, Kawarimono, Shusui, Chagoi, Doitsu, Butterfly, Budda, and Dragon varieties. Feeding your collection of fish some Koi food is also possible, they swarm to it just like in real life.

Monday, October 31, 2011

2011 Nogyosai Grand Champion

The 2011 Nogyosai Grand Champion was produced by the Nogomi Koi Farm.

Saturday, August 20, 2011

Underwater Koi Habitat Video

The camera follows the Koi around the pond as they swim through their environment. Lilies and other plants provide a nice backdrop for the school of fish. Both regular and butterfly Koi are in this hobbyist's collection.

Tuesday, May 3, 2011

New Koi Fish Variety - Irish First Minister

Irish First Minister was feeling sorry for neglecting his Koi pond when he decided to help his colorful carps out by cleaning some of the algae off of the sides. He lost his footing and tumbled into the pond. According to his twitter feed, his cries for help (the pond edges were almost too slippery to climb) were met with laugher and inspections of his life insurance policy. No news yet on how the Koi fish liked their new pond mate.


Taiwanese Firefighters Rescue Trapped Koi

A Taiwanese Koi hobbyist's two foot long Koi became trapped behind a boulder in her Koi pond. She called the Tainan City fire department, who showed up and were able to free the Koi after smashing the boulder apart. The Koi was brought to a local aquarium to receive veterinary care for the injuries it sustained during the ordeal. This wasn't the Koi fish's only brush with death, it survived Typhoon Morakot in 2009, which wiped out all of the other Koi in the pond.


Thursday, April 28, 2011

A Three year old sells Koi painting for $500.00

A three year old name Osmar Pete Hernandez sold a Koi painting that he made when he was only a toddler.  A toddler art connoisseur nabbed the piece for a cool $500.00.  The painting entitled "The Koi" can be viewed here.  Even though "The Koi" fetched a decent price, it isn't his most expensive painting available.  That title goes to a painting known as "Universal Faces", which is worth $2,500.00.

Would you buy a painting that cost that much from someone who isn't even in preschool yet?


Thursday, April 21, 2011

New Fish Lice Treatment

There is a study in the Journal of Aquatic Animal Health from the University of Florida that details a new fish lice treatment that is being developed.  It is a medicated fish  that kills the lice when the attach to the Koi.  There were fish lice treatments in the past, but they were toxic and are no longer available to the pond or aquarium enthusiast.  The new treatment targets the individual fish that is afflicted while leaving the rest of the pond unaffected.

Fish lice (Argulus) will grab onto Koi with a pair of suckers.  They then use a sharp probiscus to draw blood from the fish.  This damages the Koi and can cause an infection.  Sever fish lice infestations can even cause the fish to go anemic.


Sunday, April 10, 2011

Sarasota Herald Tribune Fish Story

In an article entitled "Couple open Country Creek garden for a cause" in the Sarasota Herald Tribune, a couple is interviewed about their Koi pond.

One of the owners is quoted "Carl's oldest fish is 13 but, he says, Koi routinely live to 100 if they survive infancy and grow to more than three inches."

In actuality, Koi routinely live from 20 to 30 years.  Most grow to be 12 to 24 inches, while the lucky ones with jumbo genetics grow to over three feet in length.

If you look at one of the photos accompanying the article, you will see that their pond is full of Koi that are larger than three inches.

[ Source ]

Retro Drain

I am thinking of installing a retro bottom drain in my pond. I would connect to a sequence 3600 pump to a bead filter and UV clarifier. The drain would be about 6 feet from the side of the pond. Should I run the tubing through a bulkhead on the side of the pond? Do I need a sensor to shut off the pump if there is a leak in the tubing to prevent the pond from draining? Thanks - Chris

If you live in an area where you can run the pond year round, you can use a bulkhead near the bottom of the side of the pond.

If you live in a cold area, you will need to shut down the pond and drain out any pipes.  If you put the bulkhead fitting near the bottom of the pond, during the wintertime when everything is shut down, the water in the pipe will freeze.  Place the bulkhead in the top foot pond wall (then lower the water level below it when the pond is shut down) or snake a pipe over the edge of the pond.  You should have the retro drain and pipe setup that is in the pond on a union so that you can unscrew it in the fall and remove it in the fall so it won't freeze and bust up.

You can place a float switch in the pond or you can use a Levolor to shut off the pump if a leak occurs.  Keep it out of an area where the fish can bump it and accidentally shut off your pond.

Friday, April 8, 2011

Royal Koi

I believe I am in posession of a very rare Koi, almost 3 feet long weighing over 20lbs and probably over 60 years old and possible of royal lineage. What is something like this worth? - Skyclub

The value of a Koi fish is determined by its size, skin luster, color potential, variety and pattern of color.

There are no Koi with "royal lineage".  Bloodlines are used to help determine how a Koi will develop when they are bought from certain breeders, but no Japanese royals breed Koi.  Koi that are over three feet in length are rare, but if it is 60 years old, its colors and skin luster will be long past their peak condition.

It is impossible to tell how much a Koi is worth without seeing it.  You should contact a local dealer or Koi club to help you determine the value of your fish.

Monday, March 28, 2011

Koi with eggs

My koi is full of eggs how long before she lays them? We noticed on Friday and its now Monday and no sign of the eggs yet. - Sage

Koi usually lay their eggs in late spring or early summer.  Changing temperatures are usually the trigger for the spawn.  You will notice that a couple male Koi are banging into the female one to get her to expel the eggs.

If your Koi's abdomen becomes abnormally large, it may be the sign of a tumor.  Only a trained vet can diagnose and remove a tumor.

New 5,000 gallon pond - Should I put rock in it?

I am building my 1st Koi pond - 5,000 gal. I have done a lot of research and feel I am ready. I have someone who will excavate the hole, and place the liner. He majored in landscape design at an excellent university and has been working for about 7 years. He recommends after the liner is placed to cover the bottom with pebbles, and stack cobblestone sized rocks up the sides to cover the entire liner. This is for esthetic reasons, especially since the pond will be lighted. This sounds like a great idea, but I can't find anything that either recommends or discourages this design. I am concerned about debris getting trapped between the rocks and not reaching the bottom drains. Any suggestions? - Bill

You are correct, the rock on the bottom of the pond will trap debris and it will prevent the bottom drain from working correctly.

Fish waste and leaves will slide across the liner on the bottom of the pond and into the bottom drain, but if there are pebbles on the bottom, they will catch everything.  Koi fish love rooting around at the bottom, expect a lot of pebbles to end up in the bottom drain.

Any rock on the bottom of the pond will need to be cleaned thoroughly on a regular basis. When fish waste builds up and fills the small spaces in between the rock, it creates perfect conditions for anaerobic bacteria to grow: a low oxygen environment with tons of nutrients. Anerobic bacteria release hydrogen sulfide, which is poisonous to fish. Hydrogen sulfide gas smells like rotten eggs and is released into the pond if the rock is disturbed.

To clean the rock at the bottom of the pond, you will need to:
  1. Catch the Koi and place then in a temporary tank
  2. Drain the water out of the Koi pond
  3. Power wash the rock on the bottom
  4. Fill the pond back up and let the water dechlorinate for a few days
  5. Place the Koi back into the pond
To summarize, you can put pebble rocks on the bottom and clean the pond out often, or you can leave the bottom of the pond open and let the bottom drain do all of the work for you.

Aesthetically speaking, algae will cover any surface in the pond.  Both liner and small rocks will end up looking the same after a year or so.  It is ok to place the larger stones along the pond walls.  They won't capture debris and will add to the water scape.

Friday, March 18, 2011

Sudden Fish loss

In about 12 hours all my koi died. We had done nothing different with the pond, the water seemed normal, pump working. Since I'm in Southern California, near the beach, the temperature range is narrow. We have had the pond for 11 years. What could have caused this? - Helen

Did you leave your hose running?

The most common cause of a pond die-off is the fish being exposed to chlorinated water.  Chlorinated water kills organic tissue of the fish that it comes in contact with.  Gills are sensitive tissue, and when the chlorinated water comes in contact with them, the cells start dieing off.  The Koi fish then suffocates because is will be unable to breathe.

If enough chlorinated water is added to the pond because the hose is left on, it will overpower the dechlorinator and will cause a die off.

Thursday, March 17, 2011

Shy Koi won't bottle feed

How do you get Koi to start feeding from bottle? Mine are a little shy. - Babs

I would start by getting your Koi fish to eat from your hand before you try to get them to eat from a bottle. You "train" them by being near the pond when they eat. Move a little closer each time you feed them until you can kneel next to the pond. When they are comfortable with that, put your hand in the water while they are eating. Start keeping some food in your hand, they will eventually eat from it. Pretty soon they will start to associate your hand with being fed, so they will come right up to you. Then train your Koi to eat from a baby bottle.

Things to remember

  • Not scaring your Koi is very important
  • Introducing a Koi that will eat from your hand into your pond will make your other Koi in your collection more likely to hand feed

Friday, March 11, 2011

8.9 Earthquake in Japan

An 8.9 magnatude earthquake struck off of the eastern coast of japan.  The epicenter was about 231 miles from Tokyo and only 201 miles from Nagaoka. No word yet on the condition of the Koi farms in Niigata.

More info on the USGS website here:

Edit: Reuters is now reporting that a 10 meter tall tsunami wave has hit the port of Sendei, Japan.

Thursday, March 10, 2011

Frozen Koi

I have 3 Koi and 3 gold fish and live in Michigan we had a extremely cold winter. We just had a break in the weather and the thaw produced one frozen dead goldfish and a half frozen 15 in Koi. The Koi worked his way to a shallow 18 in deep part of the pond. The other fish are moving around fine, but the frozen koi is moving when pushed and for the most part is laying on his side. The water temperature is still at 32 degrees, a heater and aerator are still running. Will this Koi recover? Is there something we can do to help the frozen Koi? - Chris

You should move the Koi to a deeper part of the pond.  Koi can live in a wide temperature range, but 32 degrees F is too cold.  34 degrees is the absolute minimum that a Koi can withstand.  The temperature at the bottom of the pond will be warmer, it will be closer to 40 degrees.  The chances of the Koi recovering are greater if it wasn't in the shallow area for too long.

Koi eggs left behind

We clean our pond and we take out the Kois we put them in a plactic drums and in the morning we found out that the female Koi laid thousands of eggs. We took the Kois back to the pond, but what will happen to the eggs? - Mariz

If the eggs were fertilized, there is a good chance that they will hatch into the Koi fry. If not, then nothing will happen. If you notice fry appearing in the tub, keep the water quality pristine until they are large enough to move to your pond.

Tuesday, March 8, 2011

Fish Story

In an article entitled "Koi story Pair raise and rescue colorful fish" in the Clarion Ledger about a couple that raises "domestic" Koi fish, they claim that Koi can grow up to five feet long in Japan.  It is common knowledge that Koi can only grow to three to three and a half feet long.  A five foot long Koi would be ridiculous.  A quick internet search reveals that the only available five foot long Koi in Japan are the Koinobori, the carp wind socks that are brought out on Children's Day (May 5th). Sounds like they fed the reporter a fish story.

Read the full article here:

2011 Central Florida Koi Show

The 2011 Central Florida Koi Show is happening this weekend.  It is put on by a group of the finest Koi clubs from all Over Florida.

They include:
  • Florida East Coast Koi and Pond Club
  • Gainesville Koi Club
  • Orlando Area Koi & Pond Club
  • Rainbow River Koi Club
  • Southern Koi Association
There are several seminars to attend.  The speakers are:
  • Steve Childers
  • Joe White
  • Dr. Richard and Luanne Porter
  • Joe Sprinkle
  • Bill McGurk
  • Stan Ellis
  • Henry Culpepper
  • Ray Jordan
Don't miss this show.  It will be a great opportunity to see some of the best Koi in the region.

International Palms Resort & Conference Center Orlando
6515 International Drive, Orlando, FL 32819

March 11, 2011 to March 13, 2011

For more information, visit:

Thursday, March 3, 2011


My Kois have been scratching their backs at the bottom of the tanks recently. I have read up on Ich, but I can't see the white sand like salt on them? Also what product should I buy to cure this? -Sam

There are a whole range of parasites that can live on a Koi, including ich.  Ich will have the tell tale salt "spots" and since you don't see them on your Koi, they probably have another parasite that is bothering them.  You can try using a broad range parasite treatment from a pet store.

Sunday, February 27, 2011

How to Fold an Origami Koi Fish

Follow the instructions on the video clip to find out how to fold an origami Koi fish.

Saturday, February 26, 2011

Staying at bottom of the pond

My new Kois are just staying at bottom of pond all curled up together, my question is why do they do that? When will they get active? -Aileen

Koi fish will hide at the bottom, in rocks or even in a skimmer basket when they are introduced into new surroundings.  Some people will float a couple pieces of Styrofoam on the surface to provide cover for the Koi so they will feel safer.  It can take two to four weeks for your Koi to get used to their new pond.

Koi Cam

Check out this underwater camera footage of a group of Koi swimming around their pond.

Bringing the Koi In

Well I have a Koi pond outside and there is a a very pretty koi in it. He is so pretty that I want to bring him in the house. What size tank should i get for him? He is only about 4 to 5 inches big. -Megan

You can fit in a 30 gallon tank, but he will probably grow in the future, so you may want to go with a 55 gallon one.  You can also go with a horse trough if it gets too big for an aquarium.

Hundreds of Babies

I have hundreds of baby Koi in my pond - can I keep some in an aquarium? -Mack

You most certainly can!  By putting the Koi "fry" in an aquarium, you can take extra good care of them until they reach a larger size.  When you move them from the pond, take extra care when acclimating them to the tank.  You can even go as far as using the pond water to fill up the aquarium.  Koi fry will be very sensitive to water parameter changes.

Girl or Guy Fish?

How can you tell if it's a girl fish or a guy fish? - Maria

It usually takes two years for a Koi fry to be considered a mature "adult".  Before they are adults, both male and female Koi will look almost exactly the same.  After two years, you will notice these differences:

Male Koi:

  • will be smaller
  • have a cigar shaped body
  • fins will have a triangular shape
Female Koi:
  • will be larger
  • have a blimp shaped body (they get full of eggs)
  • fins will have a rounded shape

Friday, February 25, 2011

Pond Heater

Should I put a pond heater in for my Koi fish? I live in Pennsylvania and it gets pretty cold during the winter. (10-30 degrees) - Sam

You should put a heater (also known as a de-icer) in your pond.  Your main goal is to keep a hole in the ice for gas exchange (fresh oxygen in, carbon dioxide out).  You can also put in an air stone and an air diffuser to help aerate the water.  The pond should be at least three feet deep, otherwise you should keep your Koi indoors in a winter tank.

Koi Fish Tattoo Cover

This talented artist covers an eagle tattoo with one of a mean looking Koi fish.

DO Level

We have about five large koi and have had them for a long time. We woke up this morning and they were all dead, but all the little koi and goldfish are fine. What does this mean? -Karen

It appears that the levels of DO (dissolved oxygen) in your pond water have dropped below levels that the large Koi need to survive.  Large Koi need more oxygen than small Koi, and unfortunately, they are the first ones to go when the DO levels drop.

Why did the oxygen level go down?

As temperature of water increases, the amount of oxygen it can hold decreases.  Some types of Algae in the pond will produce oxygen during the day, but at night they will strip it from the water.  Also, if you have a waterfall that aerates the water: up until last year it could have supported your fish load just fine, but this year your fish load could have increased (due to the Koi growing), so it may have not been effective at keeping the DO level up.

Add an air pump and an air stone to your pond setup to maintain the proper oxygen level in your pond at all times.  You can also find test kits that measure the DO level in the water.

Scared Fish

Its been a week since I last bought my Koi (3 to 4 inches) and I have placed them in my water feature fiberglass tank. Unfortunately, they always hide and very shy and will only come out to feed. What can I do? -Simon

Sounds like your Koi are suffering from "New Pond Syndrome".  It usually takes a Koi two to four weeks to adjust to its new surrounding.  In the meantime, it will hide until it is comfortable.

How old do koi typically live?

They usually live to be 20 to 30 years old. Several factors that determine how long a Koi will live include:

  • Overall Health
  • Pond Water Quality
  • External Stressors
  • Diet
  • Climate of the pond location

Thursday, February 24, 2011

Can Kois be kept in a tank in the house?

They will outgrow a regular fish tank, but you can construct an indoor pond to house them.  An indoor pond will provide plenty of room for the Koi to swim around in and it will allow you to view the Koi from the top down.

Koi can be kept in an indoor tank during the wintertime for a short period, but they need a larger living quarters on a permanent basis.

Missing Goldfish

Hey, we have a 4 ft deep pond and we discovered some goldfish missing. How could a raccoon get them? -Anthony

If there are any shallow areas in your pond, the raccoon could have waded in and fished out some of your goldfish.  If your pond has steep sides, it could have sat on the edge and grabbed a few.

Do Koi Entertain Themselves?

What do Koi like to do to entertain themselves, beside eating, breeding, producing wastes?  Would they play with a floating ball if i put it in the water? are they known to enjoy any type of toys? - Maurice

The only form of entertainment that Koi seem to enjoy is destroying the plants in people ponds.  That, and begging for food.

Indoor Koi Tank Temperature

What temp does the water have to be in my indoor tank? - Ron

You can keep the water at room temperature and your Koi will do fine.  Koi can live in a wide temperature range, but they are at their healthiest when the water is warm.

Wednesday, February 23, 2011

Are Koi able to be left out in ponds in freezing weather?

You can leave Koi out in ponds, but you will need to take some precautions to make sure that they will be able to survive the winter.

  1. Clean the pond out in the fall
    Leaves and fish waste will decompose during the winter time and will foul up the water.  Remove all the leaves and fish waste in the pond before winter.

  2. Keep a hole open in the ice
    A hole in the ice allows fresh oxygen to enter the water and it lets carbon dioxide escape.  If too much carbon dioxide builds up in the water, it can cause a pH crash (carbon dioxide is acidic and will use up the kh in the water.  Once all of the kh is gone, the pH drops).  You can use a horse trough heater and an air bubbler to keep the hole open.

  3. Do a regular water change
    Koi love fresh water.  Adding fresh water to the pond will also increase the kh levels so you will have a stable pH.

  4. Cover part of the pond with Styrofoam insulation
    It will help keep the pond temperature stable in the spring time when the temperature fluctuates rapidly.  Rapid temperature changes can interfere with a Koi's metabolism.

When to start feeding

We are newcomers to Koi. We purchased a house with a koi pond. We live in SC and it appears that winter is over. Should I start to feed them again?
They look hungry when we are by the pond. Can you advise me? - Lola

If I were you, I would get myself a Koi pond thermometer.  Use it to take the temperature of the pond water in the morning and in the evening.  Koi can start eating when the temperature remains above 52 degrees Fahrenheit.  Refrain from feeding them if the pond temperature drops below 52 degrees at night.

Feed them a wheat germ based Koi food until the water temperature reaches 60 degrees and then switch to a 50/50 mix of high protein Koi food and wheat germ Koi food.  After the water is above 65 degrees, feed them 100% high protein Koi food.


Will the fish only grow as large as the pond will allow them to grow?

Nope.  Koi will grow until it reaches its genetically predetermined size.  The size of the pond affects the growth rate, along with feeding, filtration and seasonal temperatures.


My Butterfly Koi looks like it is having a seizure and will not swim with the rest of the Koi and it stays on the bottom what is going on and should I be worried? - Josh

Your Koi probably has a parasite infestation.  Have a vet come out and look at the fish. The vet will also take a slime coat scraping and then will inspect it under a microscope to see what parasite(s) are on your Koi.  The vet will then go over a course of treatment with you.

What do koi fish eggs look like?

Koi fish eggs look small yellow dots, that are around a millimeter in size.  You can find them attached to the vegetation in your pond or on the pond walls.  After the gestation period, you will notice small fry swimming around in the pond.

Check out this video to see what Koi eggs look like on the vegetation in the pond:

Tuesday, February 22, 2011


What fish make good companions for Koi - Lisa

Any fish variety that is considered "docile" will do fine with the Koi in your pond.

Plecostomus are a docile fish that thrive in ponds during the summer, due to the abundance of carpet algae on the pond walls for them to eat.  They will need to be removed if the water temp drops below 65 degrees F since they are a tropical fish.

Goldfish also make good companions for Koi, but the population will need to be controlled otherwise the goldfish will keep on breeding and the water quality will go bad from being over stocked.

Remember to quarantine any fish you buy before adding it to the pond.

Any docile fish variety that is viewed from the top down will make a great addition.

Pond Size

Can I put Koi into a well filtered pond measuring 18m x 1.2m x 1.2m? -Rich

That pond size calculates to be about 6,500 gallons.  It could be wider and deeper, but it is still a good volume of water for the fish to swim in.  You can put a couple dozen Koi in your pond.

Body Structure

What is the difference between the body structure of male and female Koi carp fishes? -Geetha

Male Koi fish will have a body that is long and thin, like a cigar.  Female Koi will take on a blimp shape, since they are full of eggs.  Female Koi are usually larger than males because the many males will gang up on one female during breeding season.  You don't want the males to damage the females, so they need to be smaller.

Monday, February 21, 2011

Underwater Koi Video

A group of Koi swims around in their tank with some wonderful music.

Bug Zapper

I put a light over my pond at night so my Koi can eat the insects that fall in the water. Is this a good idea? - Davis

As long as the zapper mounted correctly so it won't fall into the water and the amount of bugs that end up in the water don't foul it up, then go right ahead.  Bugs are full of protein, vitamins and minerals (Koi find them very tasty too).


How long does it take for the Koi to fully mature? - Leanne

It takes about two years for a Koi to reach sexual maturity.  The amount of time it takes a Koi to reach its maximum growth potential depends on your location.  If you live in a warmer climate and have a large pond, a Koi will mature in six to eight years.  If you live in a colder climate, a Koi will mature in eight to ten years.

Koi Fish

Koi Fish are known to live for twenty to thirty years.  The oldest Koi fish, Hanako, was 226 years old.  The most popular varieties of Koi Fish are:
  • Kohaku (red and white)
  • Sanke (red, white and black)
  • Showa (black, red and white)
(But not necessarily in that order.)

People enjoy the interaction and colors the fish add to the pond.  The fish are tame and are often taught to eat right from your hand.

The fish can grow up to three feet in length.  The hobby originated in Japan and spread across the world around 50 years ago.  Advanced hobbyists enter their fish into shows and they compete for the most beautiful fish.

Koi Eating Water Lilies

My Koi tends to eat my leaves on the water lilies, is this a normal behavior? - Carolyn

Koi are omnivorous, they eat both plants and small aquatic animals.  Unfortunately, they find water lilies very palatable and will devour them without remorse.  The best way to prevent the Koi fish from decimating your water lilies is to cordon off an area of the pond for the plants.  You can also build a separate pond for your water lilies if you have both the room and the budget for it.


This collection of Koi swims around while being fed their pellet food. Everything is frozen this time of the year in the upper latitudes of the northern hemisphere and most of the "Koi Kichi" people are really missing their collections.

Saturday, February 19, 2011

Fin Problem

I just bought a Koi and the tail is long. We left for the day and when we returned the top of the tail is missing. Is this some type of disease? All other fish are fine. - Rob

The Koi could have broken part of his fin off.  Long fins tend to be brittle and can tear if the Koi is mishandled or if the fin catches on something in the pond.  Long fins on older Koi usually take on a ragged appearance, due to normal wear and tear.

The Koi can also have fin rot, a condition caused by a bacterial infection in the fin.  A course of antibiotics prescribed by a veterinarian or a Tricide-Neo dip will treat fin rot.

Friday, February 18, 2011

2011 San Diego Koi Show

The 2011 San Diego Koi show starts tomorrow. Koi Club of San Diego hosted one of the first Koi shows in the US. This year marks their 24th annual Koi Show. Around 3,000 Koi enthusiasts are expected to attend.

Where: Del Mar Fairgrounds, 2260 Jimmy Durante Blvd, Del Mar, CA 92014
  • February 19th: 9 am to 4 pm
  • February 20th 9 am to 3 pm

Thursday, February 17, 2011

Feeding Koi at the Japanese Friendship Garden

In this clip, we have a couple feeding the Koi at the Japanese Friendship Garden in Phoenix, AZ. The Koi love their food.

New Pond

I just bought a 5000L pond. How long I need to leave it running before I put the fish in it?

You should de-chlorinate and let the pond sit for about a week.  Depending on the type of filtration that the pond has, you may want to introduce a few small Koi at first, and then gradually add more to the pond. 

Chemical filters that use activated carbon do not require any bacteria to filter the water (the activated carbon strips Ammonia from the water).  Biological filters require the media to be colonized by Nitrifying bacteria.  Nitrifying bacteria converter Ammonia into Nitrite, and then Nitrite into Nitrate, which is harmless in low concentrations in the pond water.  Nitrifying bacteria take four to six weeks to grow so you should start the pond with a low stocking density so the water quality won't go bad.

You should add a few Koi instead of one to begin with because Koi are a schooling fish and having only one Koi in a pond will stress it out.

Tuesday, February 15, 2011

Koi Fish in Distress

I have a big Koi Pond (approximately 3500 gallons, with clear water, only six adult Koi and eight little Koi). Lately they are schooling together, and a couple of them seem to be sucking for air.  Help, any answers? -Larry

Your pond may need more aeration for your Koi fish.  If the oxygen levels in your pond are low, the largest fish (the ones that need more oxygen) with suffer first.  Adding an air pump and an air stone will help bring your oxygen levels in the pump for the Koi fish up.

Malaysian Koi Pond Harvest

In Malaysia, this is how they harvest a Koi mud pond:

Step One: Inspect the pond
Step Two: Go to karaoke bar
Step Three: ???
Step Four: Sing karaoke
Step Five (not in the video clip): Harvest mud pond

Friday, February 11, 2011

Can Koi Live in Muddy Water?

Yes they can, as long as the water quality stays good.  The water should have no Ammonia and plenty of dissolved oxygen.

In Japan, the Koi are grown in mud ponds.  The ponds are generally one to five acres in size and are lined with bentonite clay.  The Koi are placed in the ponds in the spring and, depending on their size, may going through two or three culling cycles in the summer.  In the fall, the Koi are harvested and brought to the greenhouses for sale.

Wednesday, February 9, 2011

There's a New Guide in Town

Koi Acres released a guide on how to build and maintain Koi ponds.  Check it out!

Tuesday, January 25, 2011

Underwater Pond View

In this video clip we have an underwater camera filming a group of goldfish and Koi swimming around in their pond habitat.

Koi Heartbeat Ultrasound

Here is a video clip of a veterinarian performing a checkup on a Koi.  He does an ultrasound on the Koi fish and looks at the heart beat.  This took place at Rob Koi in the UK.

Sunday, January 16, 2011

Portable Koi Tank

Portable Koi Tank

This Koi tank is 100% portable.  You wear it and you can view your Koi at all times.

Friday, January 14, 2011

Koi Feeding Frenzy

Check out the Koi feeding frenzy at a hotel in Kuai.  The fish go crazy when someone throws their food in the pond.  I wouldn't want to get caught up in that!