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It might be ick, an infection of the parasite Ichtyopthirius.& \5 b' s' p) H
1 p0 M$ t. Z) Q0 X% aYou can increase the water temp up to ~28C and give them drugs (basically Cu2+ ions), plus large quantity of water change. Google for further details. c+ f4 R9 u; b& E+ K. C" d
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It might be hard to keep all the infected fishes, but treatment is necessary to protect uninfected ones.
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3 Q5 Z% H& G Q* M3 nBy the way, is it necessary to have >20C for koi and goldfish? |
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