I bought this thermometer along with the heater that I eventually got when I realized the winter temperatures were wreaking havoc on my turtle's activity levels. It worked great! For a while. It was incredibly easy for my turtle to rip it off of the glass wall that I had it attached to and while it was frustrating for a bit, I would always stick it back on without issue. But eventually, my turtle managed to rip it off for the last time. The thing finally broke when a small amount of water got past its protective plastic. Veeery flimsy. Works well when it's safe from prying turtle claws and mouths, but considering what it's built for, it should definitely be much more sturdy and tough than it was. Wouldn't recommend it. It's probably better to spend more money on a thermometer that won't break after three weeks of use.