thermostat

I have been hearing and reading about more and more heater malfunctions and am really starting to consider hooking up thermostats to all my heaters. I'm kinda unsure about which work well and whether they work with all heaters. I really don't want to spend over $50-$75 per tank and was hoping to...

Just recently my Hydor ETH heater thermostat went out and I got lucky because it just wouldn't turn on, opposed to being stuck on and and cooking my tank. I always keep a spare stealth heater handy in case of an emergency, which I'm using now. I do plan to replace my Hydor ETH because it has...