- Chiller? - Iceprobe Hello Guys, <Good morning, JasonC here.> Great site, I have learned much and have a very successful 55 reef tank. <Glad to hear it.> Much of it due to your help.  Deep sand bed, frequent water changes etc.  I digress. I am a bit concerned about the heat of my aquarium.  Are you familiar with a product called cool works ice probe? <Yes.> Look a bit gimmicky, but I don't need too much help, just maybe 4-6 degrees in a 55 gallon tank during the day. <I don't think this device will do it for you on a tank of this size.> I was wondering if it is a useable product. <On much smaller tanks, yes.> One more thing, I would like to install it into my refugium instead of my tank itself.  I have the 18 inch CPR hang on, and frankly would rather drill into that than my aquarium. <Do-able, but not advised... again, consider something a little larger - there are other, larger chillers on the market now that use the same thermo-electric devices as the Ice Probe and are capable of handling a tank of your size.> Any suggestions would help.  Thanks. <Cheers, J -- >