Is my GPU waterblock blocked?

[ej.gale86]

Hi! I’ve just converted my soft tubing water loop to hard tubing. Plugged it in and everything worked fine, I did notice a few air bubbles in the line but thought it would go away. After a few hours my pump had stopped working and it looked like I had gunk in my gpu waterb

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[rubix_1011]

What is in that coolant? It looks like some sort of particulant matter...like some form of coolant mixture that is separating.

If that is what that is, it is very possible that this gunk got into your pump impeller...which would need to be cleaned out.