Chiller for 6 gal. reservoir?

What do you guys use to chill the res of a 6 gal. bubbleponics? Smallest chiller I can find is 1/15 hp and even that is too much.

Frozen water bottles are very cheap and work great.

Im looking for something automated.

ok, a robot that puts frozen water bottles in the res for you

you need the ice probe http://www.novatecproducts.com/novatec_products.htm it's like 50w used for 10gals fully insulated aquariums, i guess it will be just right for 6 gal grow

Those ice probes are a joke. Do not waste your money.

So you want a chiller for six gallons... You can do chiller but why for that little.