 鲜花( 0)  鸡蛋( 0)
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It might be ick, an infection of the parasite Ichtyopthirius.
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' J9 ? K8 |+ C3 M1 n5 SYou 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.& N& h2 p- M* z6 b( c$ V' O
3 J* I( g1 f- Q; z2 _( ^It might be hard to keep all the infected fishes, but treatment is necessary to protect uninfected ones.
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8 @2 N7 \( i, c% D5 UBy the way, is it necessary to have >20C for koi and goldfish? |
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