Many moons ago as a field engineer I visited an IBM 3270 mainframe site that had some cooling problems. The CPU bits were watercooled and I went through the issues. I resolved it by taking the cans of Stones Bitter out of the cooling water trough. It went back up to the correct volume and the problem was solved. I heard this sarcastic comment from the back of the room "I suppose you will be taking the bacon barns out of the UPS battery room next".
There's nought wrong with watercooling your gaming PC. It also means that you have less noise from fans etc.
