ZZZzz.. i thought fesser was a good coolant.. I just built another computer and used the same cpu block from my previous setup. I drained the fluid and everything looked fine until i looked inside the cpu block and noticed a bunch of gunk in there. I put some water in there and squished it around and a bunch of "rock" type stuff came out

what type of coolant should i use in this new setup? Im using PC-ICE right now with a UV Blue die bomb and some corrosion inhibitor that came with my fesser quad radiator.