update: Not good. the fish that has an ulcer on its side now has a small ulcer near its tail which I've just noticed. I've just put topical treatment on it, but now am wanting to see if theres anti bacterial stuff I can use.. what's your advise guys. it's not looking good.
Dying young koi... need help. flukes?
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Mmathis
TurtleMommy
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The general rule is 1000 gallons for the first koi, then add 250-500 gallons for each additional fish. I would say you need a minimum of 2000 gallons, but more is always better.
Not what you want to hear, but IMHO, at this point I would consider euthanasia. At least the fish won’t be suffering.
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Sorry this is happening.
Are you sure there is nothing in the pond that can cause an injury?
As stated before, the infection could be internal and that is difficult to treat without injectable antibiotics. Even then it might not be successful.
If you can set up a hospital tank you could treat that water with a broad spectrum antibiotic, but don't put that medication in the pond. or you could use the topical medication you used before. Here is an article about antibiotics that can be used on fish:
aquariumstoredepot.com
But, as Mmathis said, it might be time to let this one go.
Are you sure there is nothing in the pond that can cause an injury?
As stated before, the infection could be internal and that is difficult to treat without injectable antibiotics. Even then it might not be successful.
If you can set up a hospital tank you could treat that water with a broad spectrum antibiotic, but don't put that medication in the pond. or you could use the topical medication you used before. Here is an article about antibiotics that can be used on fish:
Antibiotics for Fish (What Is Best?)
Bacterial infections are a headache for any aquarist and finding the right ones to use is stressful. This article helps you make wise choices as to what medications work best.
aquariumstoredepot.com
But, as Mmathis said, it might be time to let this one go.
You never let your pond cycle properly. Have you contacted the place you bought the fish!?. They should have questioned you about the pond before selling you fish. All about the money.
3 feet deep 12 feet long 8 feet wide. all females or all males koi can out live us .
I have never been questioned by anyone about my pond before we purchased fish, but you are correct... it would seem to make sense to find out where the fish are headed when you sell them.
I think far too often it’s just a teenager working a summer gig who could care less.