Second bad experience. Heater set at 82 degrees but found my Albino Iridescent shark lying on the tank upside down while the rest of the fishes appear in no distress (Odoe, Dat, koi) When I fished it out, water was freezing. The ID was barely breathing, I tossed it into another tank (78-80 degrees)and after a few minutes it began moving, swimming upside down, in circles. Few more minutes it's slowing recovering swimming normally.
I started to medicate with ich medication plus salt -keeping fingers crossed. Found a spare heater to replace for now.
Few years back, a different visi therm over heated the tank and all my dats died.
I know marineland heaters had a recall few yrs back, anyone heard of one for Visi Therm?