Heaters - Watts per gallon

[TheReefGeek]

So far people are running 2 to 2.5w per gallon. I am just wondering because I need to figure out how many watts I need to add with the larger sump I am adding.

KrazyKuch: I had a Kevin call me about my Berlin skimmer who had a 2-55w PC to trade, was that you? I deleted the phone message with the phone number, and I wrote the number down wrong so I have not been able to call back!