I'm thinking about stocking for a 55 gallon, it will have full glass tops and a 300 watt heater. Will keeping the tank at 80-81 vs 74-76 have much difference in terms of power consumption? It gets cold in the winter NY long island and i don't like to waste money heating my house that is larger than we need so the thermostat is usually set around 60-62. I'm looking at neons vs cardinals and their temp requirements. Will heating this tank a few more degrees make it that much more expensive to keep different fish or will it be hardly noticeable?