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Fill at least 2 gallon tank with distilled water, submerge the pump and add the hoses to inlet and outlet.
Keep the return hose below water level to prevent bubbles.
Add a few drops of dish soap to keep bubbles down, run the water for 15-20min and check inside the machine at the tube, you cannot have any bubbles inside the tube. Tilt the machine to remove it, or add more drops of dish soap.
If you want to learn more about water cooling setups, check out this article about optimal watercooling for k40 laser
There is other suggestion on Facebook-groups and forums, of other mixes to add to the machine, i leave them out as i have bad experience with them, and i do warn for using anything other than distilled water. I wan´t my articles to be 100% safe for everyone to use.
