no chiller, but i do run 2 window boxes on full blast around the clock-even when i'm not home
my last electric bill was 240.00, and i'm in a 2 bedroom apartment 8O
no chiller either. on hot days I have a normal living room fan blowing mainly omn the op portion of my tank. Plus, I run my lights at night which probably helps out a little bit.
My tank runs from 77-79 winter and 78-81 for most of the summer. ON the real hot days it will spike at 83. Yesterday, when I turned off the 7" fan to cut some frags and failed to turn it back on for 12 hours it spiked at 84.4 8O All is fine today.