Ever since I saw how much water I wasted on cooling my first 10gal batch, I had to build something that used the same water. A small deep freeze, 8gal and 13gal trash cans, and a pond pump (100-130gpm) and a cheap thermometer with a probe. Had the water down to 46deg, circulated and the wort was comin out around 80deg. I turned the kettle valve down some and got it down to 64 deg, and the chiller water got up to 68deg after 5 gal. Thinkin colder chill water (obviously) and possibly some RV antifreeze, any thoughts?