I would set it up because, depending on the lights, filter and if you use a top. You may not need a heater. There is a mini one. Or you could always put a normal heater in your HoB filter.
Originally Posted by jacksonpt
Take a look at the 25w Marineland Dual-Temp heater. 25w is perfect for a 6gal tank, and the heater itself is very small.
I agree.