I happen to be one of those hobbiest that recently had an issue with an "off label" Prazi product. I measure all meds using proper tools (grams scales, syringes, etc) Now I can't say for sure this was the cause, but the last thing I did before I lost 1/2 of my collection was a prazi treatment. Within 48 hours my fish were lying over piled on top of one another. All of my large show fish are now gone. The gills appeared in good shape. The bodies were all red, the eyes clouded over and popped. This tells me that something toxic went internal and whacked organs so much that the fish could not recover. The smaller fish are recovering and doing ok today.
I'm still having trouble getting the water right in my big indoor holding tank. All recoverin fish are now in my Q-tank. Incoming water is the same for both tanks. Basic filtration is the same as well, just smaller on the Q-tank.
Once the meds were introduced to the larger tank, the water started to go cloudy and foaming on the surface within 48 hours. Prior to this the fish had never looked better.
Sue
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Sue
2008 Upper Midwest Koi Club Show and Product Expo
AKCA
Open Show
August 2nd & 3rd, Minneapolis, MN
Judges: Ray Jordan; Bob Brudd and Peter Ponzio
http://www.umkoiclub.org/