Hi guys i am also having the same problem. when i initially built my system on 27/12/2011 my tubing was crystal clear but on 1/1/2012 after only 6 days my tubing was cloudy. i was using distilled water with primochill liquid utopia and Mayhems Red dye. i had pre-treated the 5 ltrs off distilled water before filling my loop. Here are the pics off before and after.
Before when the loop was first built
After 6 days off running
haere are the tubes after replacing them with the left over Primoflex LRT 1/2 ID X 3/4 OD
After replacing the tubes and filling it with the same distilled water and mayhems Pastelle Red dye the tubes have been coated again.
Replaced tubes on the 10/01/2012 and the tubes have clouded enough to change the dye from blood red to pink on 20/01/2012 thats 10 days after changing out the tubing. .
on the 10th this is what it looked like
on the 20/01/2012 this is what it looked like
Primochill really need to fix this if its a problem with their tubing.
im gonna change out the pipes AGAIN for the third time and this time im gonna mix Mayhems Red Pastelle dye with fresh Distilled water (250 ml of dye with 750 ml off Distilled water= 1 Lt off coolant) and see if it happens again. I have a feeling i may have overtreated the water i used in the previous 2 loops.