"Tell us a lot more about your equipment, lights, pumps, tank size....there is a lot you can do with fans to reduce your tank's heat and avoid needing a chiller but it depends a lot on the equipment on your tank. How hot do you let the house get during the summer? Do you run your AC when you are not at home?"
its not set up yet, got tanks, sump, and some marinepure bits and dry rock which il later supplement with pukani. as for equipment im looking at some voyager 3 stream powerheads to run on a wave maker, and an eheim 600 compact pump. for heaters im trying to pick between a couple cobalt easy-therms, or a hydor ETH external heater. im probably gona get a reef octopus skimmer, but only for emergencies, as i will be using a cryptic zone in my sump's refugium, and a stand alone planted refugium for removing excess nutrients. not sure about lights, i could just go with metal halides, but i love the idea of LEDs lighting my tank.
i usually let the house get around 70 to 80 degrees if im home. dont usually run the ac when not at home, it wastes alot of power. im thinking that a chiller will be easier on the electric bill. also with the threat of power outages, the temperature at home is irrelevant, it'll be death valley in there and i need something to hook up to car battery.