I think I am going to end up getting at Eheim 2217 filter and as far as a heater, all I ever saw was the submersible kind, but then ran across this one ETH In-Line Aquarium Heaters | Aquarium Heaters | Fish Tank Heaters | Aquarium - ThatPetPlace.com Are these just as good or better than submersible kinds? This seems like it would be nice, to at least cut back with equipment in the tank, and possibly safer too since they can't break inside the tank. Anyone use these? And is 200 watt good for a 50 gallon?