Last night i drained my water cooling system just to give the case a good cleaning and a refill. Once i drained it i noticed that the tubes had a milky residue on the inside of them. Pretty bad actually. THey werent even transparent anymore. So i tried to clean them out as best i could. Didnt turn out too well so im going to home depot to pick up some more tubing today. I was running a mix of distilled water, water wetter, and green uv dye. Any better reccomendations on mixes i should run to maybe stop this from happening again? I think part of the residue was the fact i used plain old tapwater to leak test it. So im thinking that had something to do with it. This time around im going to use distilled water right away.