Wooo, just changed the water in my Swiftech WC setup. it was turning a nasty brown color. Used to be UV sensitive Green. I think this is the original water i put in when i got the kit, i can't even remember when that was. Definatly more than a year ago. So i found some new antifreeze in the garage and watered it down 50/50 with distilled water. Now it's deep blue! looks awsome! I also had a chance to clean all the crap out of my Apogee waterblock. Some weird black slime seems to have grown and got lodged in the copper fins. The fresh Ceramique hasn't had a chance to settle yet, but temps are already down by 6c! I'll get some pics soon.