I have the yong heng and just wanna know what should I use to avoid rust and getting the best cooling. I know most people are just running with tap/sink water and ice. Sure it would keep the compressor temp down but wouldnt it rust with all the materials in the tap? I've seen some folks tear their compressor down and inside the head is all corroded with white stuff. Wouldnt distilled water or coolant be the better choice? Would it benefit to use coolant over distilled? Distilled 1 gallon is $0.80 at wal mart vs coolant $10-15.