I've bought a few Elite Heaters not sure I would bother again :roll:
The first one filled up with Water, so my Guppys had NO Heater at all for a day untill I noticed the Water was Stone Cold.
They dont keep their Temp terribly well either, I have 3 of the same Heater, 1 Overheats, 1 Underheats, and the other seems to Flucuates.