I have eight 50w heaters, two 150w and one 300w. My houses daily cost for
electricity is $2.38 cnd. I use a natural gas furnace and hot water tank
which helps keeps the cost of power down. I found the biggest electricity
expense is the lights on the tanks. A 250w lamp for 10 hours a day will add
up over the month. I try to keep low light plants, tight glass lid, and
keep cooler temperature fish to reduce the power bill. I wouldn't want to
quit the hobby because it got to expensive.
Andre