Temp range from 41F to 64F, 41 ish is where I normally find bottom water temps in ice covered ponds.Product is VitaStim Polar LM from AquaFix.(see label on our site under our Bacteria link on home page.) I think Keeton has a psychrophilic product also.If there is interest Ill see if Kevin Ripp President of AquaFix could chime in about specifics. Kevin did a PondBoss article last Nov/Dec 2012 about "whats happening" in cold water called "Winter Treatment of Ponds The Incredible Transformation" page 22. I think Nate is using some cold water bacteria also for another good reference.
