I get 'freezing damage' on a Thermal Aquatuner when I shouldn't. I have two Thermal Aquatuners sitting just coverd in an insulated tank of polluted water with one space between them. Clean water is being pumped though them in series to cool the freshwater and I thought maybe eventually boil off some polluted water. However the second aquatuner (or maybe its the pipe right at the connection) gets freezing damage, breaks and lets the fresh water into the tank. The thing is, it's no where near freezing. No way it should freeze at 44C and higher ever right?