Pond Boss Forums AERATION Should I aerate? System foze up.

From what I saw in one pond last year that had a winterkill, I tend to agree with Bill.

10"-12" HSB's had a 98% mortality rate, while 2# RBT only had a 70% mortality rate. I thought HSB's would survive lower DO than RBT.

I could very well be wrong, but I think the RBT were in slightly cooler water than the HSB's and that water had slightly more DO, that's why they survived. I believe it was a short duration DO crash.

They weren't being fed, so they couldn't get any O2 from the pellets either....