Hey guys, I am in the middle of replacing my tubing and cleaning out my PC due to the fact that I noticed that I have mold (it seems like) on the inside of my tubes and some inside my waterblocks (CPU and GPU). I thought I did everything right when I set it up about 6 months ago. I have the Asetek Antartica watercooling setup and used the watercooling additive like I was supposed to. I'm just wondering what could cause mold to grow inside my waterblocks/tubes and how do I prevent it? It seems that it was also severely hindering the performance of my watercooling too. Plus, whats a good way to clean out the waterblocks? Thanks in advance for any suggestions.