Bests & Worsts Reviews from Amazon

REALLY annoying. The note says that this particular model contains a clip instead of suction cups. Which is a poor decision. The top of my tank (and a lot of fish tanks) aren't flat. so the minute I tried to install it pushed off and won't work correctly. Luckily I held it down with the cord of the heater I have in the tank but none the less I'm annoyed.