Hello all again

once again I have a few questions I was wondering if anybody out there could answer.

I'm looking for a way to watercool without using any fans. although I have not heard any radiators in use, i would imagine a a good radiator to need at least 2 120mm fans. even if they are running at 7v, they won't be overly quiet. so iwas wondering if there were other ways to cool water. I was thinking about bubbling cool air into the reservoir water with airstones. would the bubbling of the water cool it down enough to make it usable for water cooling? (My method of bubbling the water would be noiseless)

I was also wondering if there was a way to cool down powersupplies using water instead of using a fan.

any comments would be appreciated