Review on AQQA Submersible Temperature Controller Freshwater Fish & Aquatic Pets via Aquarium Heaters & Chillers by Megan Washington

The first one I bought got an error about a week later (sorry I don't have the manual with me and I can't remember which one, but the manual had it say switch turn it off and restart or replace it with this error code.apparently i returned it and got a new one thinking it was an accident.in the middle of the night we were woken up by a beep downstairs and we found that the new device (working about 6 weeks) has the same error message. My husband restarted it and it seems to be working fine again. But it's already too risky! What if it happens when nobody is home? too tricky when setting the desired temperature, and often only comes close, even by my own measurements (i.e. I set it to 77 degrees and it says it's 76.5 degrees and "on standby" rather than the picture heating up to 77. As if he's not even trying to be precise.) Of course, we're now outside the 30-day return window with Revain. I'm nervous about continuing to use it.