OK, we've moved our brewing system, and are now on municpal water. So we have to re-use the cooling water, or pay a fortune.
I have thermanator plate chiller for cooling wort. I'm thinking of using my pond pump in the bottom of a sink full of ice water (just freeze milke jugs full of water) and then recirculate through the plate chiller and back into the sink. I don't know how much the water will heat up, and how much ice it take to make this work.
Any other ideas on re-using cooling water?