Thanks!
Hmm... If you've been reading my "Cooling a water reservoir" topic, you'll know what state I'm in.
According to the shop I ordered the kit from, it should come next week. Yeah, right.
I'll get a 30-40liter bucket and use that for a while.
So, it feels like soapy water, huh?
First, I'll go pure water.
I'll experiment with it then, putting a half liter of antifreeze and 0.5 desiliter of liquid soap... Then I'll see about the temperature differences, and do some more experimenting.