Well i've had my liquid cooling setup (in my sig) since june of 06 and it hasn't missed a beat. However the tubes over time have clouded up a little bit, and today for the first since june i toped of the water because as you know the level does go down.
I toped it off (no biggie) and i took a paper towel to wipe off the fill port and i noticed discoloration on the paper tower. The uv dye thats in my loop in green, but the color on my paper tower was yellow, and redish orange. Is this rust

My temps have not changed, infact they're even better since the last time i topped it.
When i first liquid cooled my pc i used zerex, and frozen cpu's uv green dye. I think overtime the dye and the coolant some how didn't mix very well, but i really don't know.
Anyone have this problem before?