Ok getting a new tank, and I am curious what you guys buy for heaters for these big tanks. It has a big sump and I was planning on putting the heaters in there but.... how many watts, and how many heaters? I have been told all the way up to 2500 watts total. So can I just go with a pond heater or something like that. I do not want like 10 heaters in my sump. What is the most convenient, and cost effective way to heat this thing. House is a constant 70 and I need the tank to stay around 80. Please any input would be great I have been going through other threads trying to find something on this all morning with no luck.