is it possible for me to put a heater inside the filter? Im getting tired of mine, i have no sump and it has suction cups, everytime i turn around that this is off the glass.... I even replaced the suction cups and it still doesnt want to stay...
There is no problem in putting the heater in your filter as long as it fits. The only reason for putting a heater in the sump is to keep it out of view. If your filter has a plastic housing, make sure the heater isnt touching anything that could possibly melt and cause a leak.