Great topic here....I am going to step up from 5Gals to 10Gals in the very near future, currently I just use an immersion chiller with at first just a hose (ground water here is always above 60, most likely 70+) I try to hit 90F, then switch to ice water....any way My biggest question is,, I see a ton of cold break in the boil kettle this way (think egg drop soup) if I switch to a plate chiller or counter flow chiller....wheres that cold break gonna end up? and how do most of you deal with that?