Setting up a WB20 cube and I'm in the process of buying all the parts. I must not have realized it, but I just checked the heater, a Cobalt Neo-Therm Pro, and realized I got the 25w version when I meant to get the 100w version. I plan on stocking the tank with fish and coral, and I'm not sure if this heater will be powerful enough to heat this tank up at 25w. Living in MD the temps get pretty cold, however, the temp of my house usually is between 70-80 degrees. Thanks!