You forgot to add Rec.ponds to your list of crossposts!
Go ask there for more specific answers, sounds like it could be ammonia
poisoning, you either have too high a fishload or your filtration is not
keeping up with the cycle. HTH
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"In the beginning, God said the four-dimensional divergence of an
antisymmetric,
second rank tensor equals zero, and there was Light , and it was good."

"Jon Pike" wrote in message
. 159...
Okay, one of my koi's seems to be getting sick. I noticed just today that
on his belly he's got reddish/brownish lumps. Normally it's flat white.
What could this be?
TIA.

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