RE: in the market for a chiller
Have you considered upgrading your cooling fans before spending the money on a chiller? Cooling fans should be able to handle 250 watt MH and they are a lot cheaper to buy and, maintain, and power costs are a lot lower than a chiller.
I have 4 X 100 cfm fans on my 125. I actually have to keep my fans on a timer because it can get a little to cool at night. My temp stays around 80-82 max with 2 fans running 24/7 and 2 running about 8 hrs. a day.
Gary
125 SPS, 75 gal. LPS/softie reef, 9 gal. Nano