I suppose Calfo is pro-low-flow as well. Hes mentioning it all the time as of late.
As for the computer...Im just sick of noise. I run some pretty hot stuff, and that means 4-6 120mm fans spinnin' away on a case...and my new rig is a Socket AM2 x2 4200, and some of these new chips are supposed to be awesome overclockers (like 700mhz over stock and completely stable) if you have the right cooling (read>water). The computers also generate some heat (700watt PSU, 2x 7900GTXOC video cards, 10,000 rpm drives, etc) so I was thinking that running the radiator to a remote location in summer (outside) would mean less work for the A/C. As is, the office, where my computers and the woman's reside, gets its own A/C unit because its the hottest room in the house.
Water cooling in PCs is done for one of two reasons...for noise elimination, or for getting an overclocked processor to not fry (okay, maybe 3rd reason: its fun). For better performance, radiators with lotsa fans are used...kinda defeats the noise thing then. And passive units that exist aren't as effective at cooling. I want both. I want silence, and excellent cooling. That means I need a very large passive radiator...larger than anything produced for the consumer market.
Eheims are pretty commonly used in water cooled computers (aquacomputer.de and innovatek.de have custom made 12V eheim pumps made for them) because of their low noise, high reliability, and low heat transfer. Besides custom made 12V pumps, the 1250 is an ideal pump for larger setups like mine when used with a cheap 120v-12v pump relay. I figure I already have a few 1250s just laying around, making the reservoir should be easy since its just like a kalk reactor...but in this case Ill make mine 3" diameter and 6' tall to match the finned pipe in size.
And its just plain slick...check out some of this stuff.
http://www.frozencpu.com/scan/se=Water Cooling/se=Reservoirs/mp=menu_search.html
http://www.frozencpu.com/scan/se=Water Cooling/se=Water Cooling Kits/mp=menu_search.html
The water cooling PC market is booming...but for 'designer' stuff, you pay designer prices (like that $300 innovatek passive radiator)...so I figure Ill make mine better for a fraction of the cost. Unlike CPU coolers which change every year or so with new processors and sockets, water cooling blocks can last decades (just swap out the retaining clips), so its an 'end all' solution...or at least until processors exceed 300watts in thermal output. Heck, I should be able to run a few computers at once with this setup.