<a href=showthread.php?s=&postid=14927624#post14927624 target=_blank>Originally posted</a> by serpentman
Probably not even close. My current system is about 275g (150g with a basement sump) and requires 3 x 250W heaters to keep up.
On my new system, which will be entirely in the basement and should be around ~550-600g, I planning to running either 2 x 800W or 2x 1000W heating elements.
In the end, a lot depends on the average ambient temp in your basement. Mine currently runs ~65-68F year round.