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Keep the Water Healthy For Koi Pond Fish

31 Dec

Koi pond fish keeping generally turns out to be more of a water keeping and cleaning hobby than it is a fish keeping hobby in terms of care, maintenance and upkeep of Koi ponds. Now at first glance, this may sound a little strange to you as one does not necessarily get into the hobby of keeping and caring for water, but if you think about it, it does make sense when you consider the environment you are creating for your Koi fish is all about, you guessed it, “water”.

Koi health is highly dependent on the quality and stability of the water in which they live. With that said, it is worth understanding that clear water does not necessarily mean healthy pond water for your Koi, and the reverse holds true as well.

Having recently spent time at a new Koi pond fish development, I had the opportunity to consult with a very worried owner. Her pond had low (but measurable) levels of ammonia and nitrite, and at the same time it had a good amount of unwanted algae growing in it. As it turns out, the water in the pond was passing too fast through the pond filter’s UV Sterilizer. Instead of killing the algae, the UV portion of the filter system was just lightly zapping the algae. In other words, instead of killing the algae, they were simply getting a tanned before returning to the pond water for further growth.

It is worth clearly understanding here that in order to adjust this glitch on a manual labor scale, we would have to replace 1/3 of the pond’s water. In terms of your Koi pond fish, that’s a huge and drastic change in a relatively short amount of time. Imagine if you will being put into a small airtight room. Now imagine someone taking 30% of the air out of that room and at the same time, the room gets smaller by 1/3. I’m feeling a little tight just thinking about it myself.

This kind of adjustment for a new pond would be extreme and was not advisable to say the least. A lot of things, on multiple levels of development, growth, stability and balance, are going on in a new pond – the bio media within the bio film are trying to progress and cultivate to optimum levels of efficiency among other things. One-third water change on a weekly basis is far too risky because with new water, you stand the chance of adding a lot of unknown elements and organisms that might affect the life and well-being of the Koi pond fish living within it.

In cases such as this, it’s best in this particular instance to just let sleeping dogs lie and leave well enough alone. It’s more important for the new pond water to be giving time, with patients and a careful watching eye, to reach stability than for it to look crisp and clear right from the start. Wait for stability to set in among all of the bio functions going on in the water; then clean later if it is still necessary.

Get your FREE 10 day Koi Carp Fish Care mini course, today. Jessica Arons specializes in Koi fish care and is currently working with the Koi Fish School team. For more great tips on Koi Pond Fish visit The Koi Fish School today.

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Nice Pond Fish photos

25 Dec

A few nice pond fish images I found:

awful fishing pond – super wide
pond fish
Image by 3CENT
There are absolutely no fish in this pond and the weather is always bad. Stay away. You’ll thank me.

Fish Pond
pond fish
Image by KimmerKC
Our fish pond garden has gained some more ornamentation this year, including a shade tree, spitting turtles, and a fisherman.

Urban Fishing Pond in Ichigaya Tokyo
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Image by shinyai
Urban Fishing Pond in Ichigaya Tokyo

How long do pond fish stay pregnate for?

5 Sep

Question by ~ Bs2S ~: How long do pond fish stay pregnate for?
I have a pond in my backyard with pond fish in it, anyway recently one of them has gotten a very big enlarged stomach so im guessing shes impregnated… How long do pond fish stay impregnated for and what do they do when the give birth where will she lay them?

Best answer:

Answer by llriffel
well first off most fish do not get pregnate most pond fish are verities of gold fish and they do not get pregnate she may be filling with eggs if you have a male they may spawn at wich time the eggs will become fertalized if you don’t have a male well there wont be any babys and if she drops the eggs good chance the other fish will eat them anyway

What do you think? Answer below!

Caring For Your Pond Fish in Winter

8 Jul

Winter can be a very tough time of year for your pond fish outside.  And its very easy to temporarily forget about your fish outside as they become dormant and require less of your time.   But winter is still an important time for your fish and you need to keep an eye on them to check that they are fit and healthy enough to cope with the extra stress that freezing temperatures can bring.


Preparation is the key!  Before the temperature starts to drop and we start to get frosts you should check that all your fish are healthy and well fed.  Fat reserves will be used up during the cold winter months so be sure that all your fish are feeding well over the last few summer months.  Treating your fish with an all round treatment such as Tetra’s Medifin is a good idea.  Do this before the water temps drop too low as most medications will not be as effective.

Winter Arrives

When the first cold spells start to arrive it is very important to feed your fish a wheatgerm food.  This is a specially formulated food that fish can easily eat and digest during colder temperatures.  You can feed your fish wheatgerm food all winter if they are actively feeding (over a mild winter).

If in the coldest of winters your pond should freeze over completely, don’t panic too much.  Fish can survive a short while on the absorbed oxygen levels in the water (which is higher in colder water).  Importantly do not smash the ice.  All fish are extremely sensitive to vibrations and water pressure.  Smashing ice on the pond can stun and kill your fish.  Ideally leave something in your pond to keep an area ice free over night or gently melt an area of ice in the morning.

Now is the time that you should really keep a close eye on your fish for signs of disease.  Now the water temperature has dropped so has your fish’ immune system and defence against disease and parasites.  Look for any abnormalities on the fishs skin and scales.  White dots, red patches and red streaks imparticular.

Also look out for any out of the ordinary behaviour.  Unusual swimming patterns are a very good indicator that something is wrong.  If one fish separates itself from the others this usually means that something is wrong.


Water Works Aquatics supply a wide range of quality goods for your fish keeping hobby.  We also run

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Check out my pond fish (goldfish, fantails, shubunkins) and huge 15 yr. old white butterfly koi at feeding time. Pond is 8 ft x 23 ft, 1900 gallons and 3 1/2 ft deep.

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Big Rock Pond Fish Stock

4 Jul

putting fish into the pond….to eat later
Video Rating: 5 / 5

A nice video of my Koi 65cm kohaku after receiving the ulcer treatment. The Koi Pond has 29 japanese Koi Carp and the pond is 6.5 feet deep.

Nice Pond Fish photos

23 May

Some cool pond fish images:

Jim Fishes in Small Cypress Pond
pond fish
Image by Old Shoe Woman
After the Christmas Celebration at Wayne and Pat’s, Jim and I went to the fish ponds where Jim caught 3 small bass. It was about 49 degrees Fahrenheit but felt like 45 degrees–a little chilly.

Memorial Day 05-Fish Pond Reflection
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Image by Old Shoe Woman
My sister-in-law walked around the pond to continue trying out her new lure. Will she catch any fish?

Fishing by Pond’s Shore
pond fish
Image by Old Shoe Woman
Saturday afternoon Jim and I went to the fish ponds. I recorded a conversation between us and made a podcast at:

Fish pond

23 Apr

A few nice pond fish images I found:

Fish pond
pond fish
Image by etmeyer
This is the remains of a medieval fish pond. Once a common site in the landscape, now quite rare, in medieval times there were over 100 fast days per year in which fish was to be eaten, so fish ponds were quite important. Minster Lovell Hall would have had a fish keeper responsible for the fish and the ponds.

fish pond
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Image by cskk
Happy fish in the pond filtered by the barrel garden:

Recreational Fishing Ponds
pond fish
Image by drs2biz
Wendy’s brother, John (Wei Jie) knew I enjoyed fishing, so he took me to the local fish ponds for a catch!