Originally Posted by Bal3Wolf
Ouch you used dyes in your loop you will regret those later when it gunks up your block and stains the lines and res. And thats not codensation thats just where bubbles are sticking to the walls of the res mine did that till i had all the air out.
his picture does show condensation. You have to remember that in order for condensation to be formed, there has to be a temp difference, in this case, the water in the loop is much warmer then then the outside, so it is evaporating and collecting on the top of the res, it is completely normal.
Go sit a water bottle in the sun for a few hours, it will turn into what looks like a small eco system. Actually that is exactly what it is doing, same thing our environment does with water and rain, Just on a very small scale. Evaporates, collects up top, and then comes back down.