Originally Posted by kkorky
Never use your reservoir as a guide as to whether you tubes are clouded or not. All too often the reservoir remains crystal clear, and so do the fittings -in my case the blocks and tubes had deposits, but the reservoir was clear.
You will not be able to fully tell till you strip down your rig.
I know but when I had my R-3603, I press the tubing and it had so much "white gunk" inside it start snowing in my reservoir (imagine my CPU block). It was just like an approximation of the fact. But you are right that I will need to break my loop to see, unfortunately
Anyway, it is good to know that your Feser tubing aren't clouding.