Bequiet AIO noisy Recommend a fluid for top up

[mattyg]

As title guys.

My AIO sounds like a beehive. Its been playing up on and off for the last month or so but now I cant seem to get it to shut up.

Any recommendations on a small amount of fluid to top up (internet suggests its an air bubble issue and topping up should sort it)

Someone mentioned evaporation is the cause but its a sealed system so I doubt it..

 

[mattyg]

"sealed" systems do lose fluid over time - that's why top-up ports exist. The tubes can be somewhat permeable to microscopic amounts of fluid, plus joints can let a bit out. You also get cavitation where dissolved gases expand out of the fluid over time.

If you just need a little top-up, I'd use distilled water. If draining and refiling I'd consider something with anti-corrosives and biocide in, but in this case you should be fine without.

Cheers mate. I've just received the cheapest mayhems liquid on OCUK as I needed something to help fill it too (squeezy bottle thingy)