yeah i like the look of having it in my sump so you cant see them. i checked all three of them last night and they all were working(felt hot to the touch) but i think im going to try and take the two 150 watt heaters and put them in the main tank, and leave the one 200watt in the sump. im just going to have to go get a bigger and nicer heater soon. just to add that all three of these heaters are less than 2months old.