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Old 09-29-2004   #2 (permalink)
JasonS
Tategoi
 
Join Date: Dec 2003
Location: Rocklin, CA
Posts: 413
Food or electrical leak.

Bad or low quality food can cause deformations.

An electrical leak from a submersible pump is another likely source.

Get somebody who really knows koi to look at your entire setup, end to end, and you might get some tips.
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