Same here I have had two ink birds go bad. I just had one go bad after a few days. I had got it very cheap and was a spare that i decided to use for my phyto system in the winter. Garbage.
10.5 F ok..
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I use my Hydros to control heaters on a few tanks but I also use a heat controller with them. This way I have double protection and it saves the outlets on the controller. I have done this with all my controllers over the years because those outlets are not made to turn on and off as much as a heater can depending on where you live. . This saves wear and tear on those outlets.
I use Baylite controllers and just purchase a Inkbrid sensor for them.. Have been cheap and reliable.
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Ranco is the best but not cheap.