Or you could just make (or buy) a heater guard for very cheap instead of buying one just for that reason. Just a thoughtMost recommend these for Oscar tanks, but I use the Visitherm stealth heaters, particularly with plecos. They are a plastic covered heater, which tends to be a bit easier on the tank and the plecos. I, personally, don't like touching the glass heaters, since they get warmer on the glass, but the plastic ones don't.