I live in a terribly insulated 3rd floor apartment in a house, I feel your pain. My A/C bill for a one bed room was 150 bucks this month (usually about 40 dollars) because I had to keep it running continuously too keep my new 14gal that has LEDs in check. I may get a chiller over the winter when peoples prices drop/get out of the hobby, and the worst is hopefully behind us being we are coming into september now. Good luck.