I finally got the chiller I had been wanting, works a charm, keeps the tank below 24 even on days when the temperature is in the high 30's. I accidently unplugged it for a day though and lost around half my stock. A was given 5 more A/S grades though to keep my population going. I have an A grade female pregnant and I can't wait for the babies to be born. I also rescaped their tank, it still has lots of growing in to do.