Any chance low DO was not the culprit? Just typing out loud here, but the aerators were running, and should've helped infuse some O2 into the water, and possibly kept an area around the boil open for sunlight penetration? Also, all sizes of fish seem to be affected, not just the larger specimens commonly seen when low DO is the culprit?

oops...sorry Dale, didn't mean to step on your toes...I type too slow!

Last edited by sprkplug; 06/17/15 09:37 AM.
"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.