hydro - you on the smart meter? they installed them in london LAST YEAR but we are still on the tiered pricing - they havent moved over to billing by time yet. I am waiting to take advantage of it though... we do all our laundry on the weekends, and the dishwasher is set to turn on at 11pm. I would setup the tank to run lights from 7pm to 7am - they are probably your biggest draw... the heat from the lights will keep the tank warm in teh winter and help keep things cool on teh summer days. maybe even put some of the powerheads on a timer and go down to half flow at night?
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