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Anna, Koi Keeping-expert
Category: General
Satisfied Customers: 11065
Experience:  Biology degree, 35 years fishkeeping experience
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Small wiggling parracine seen on the koi and a few small

Customer Question

Small green wiggling parracine seen on the koi and a few small pink holes also seen. Koi are sluggish, laying at base of water falls and some have died.
Submitted: 1 month ago.
Category: Koi Keeping
Expert:  Anna replied 1 month ago.
Hello and welcome. My name is ***** ***** I'm a biologist with a special interest in fish. I'm sorry to hear you are dealing with what sounds like a nasty problem. I suspect more than one condition may be occurring at once.Since you have sen parasites and the damage they have caused, it's important to go ahead and treat for them. Praziquantel is among the safest General antiparasiticals for koi. You should be able to buy it at a store that sells pond supplies or at a pet store. Just treat according to package instructions.I'll be right back with more.
Expert:  Anna replied 1 month ago.
The other important thing to do is test your water. When fish stay near fountains and waterfalls, they are often seeking more water movement and oxygen. That usually means there is a problem with the water. Use a test kit that has test tubes and chemicals you add to water samples. The kind that just has paper strips you dip in the water is not very reliable. We want ammonia and nitrites at zero. Nitrates should be under 40 parts per million (ppm). If you find you have ammonia or nitrites present, let me know right away and we'll proceed from there.Temperatures that are too high cause koi to need more oxygen.they do best with temperatures below 80*F. Providing shade and increased aeration can help when temperatures are too high.Because some fish have died, there is either something wrong in the water, or a serious disease is present. Let me know your test results. If your water quality is good, we'll have to start looking at possible diseases.Anna