Looks like you guys will be ok without the heater. Have not checked the temps in my house but that is one of the reasons I got the OASE biomaster thermo 600 which the heater is in the canister. No more the ugly look with the heater inside the tank.By coincidence I unplugged my heater on my 240 gallon fish and plant tank. Water temps went down from 80+ ( heater was hard to adjust) down to 73-75 range. Plants and fish seem to be doing even better. I was adding to the heating bill to make things worse? Forget that!