I water cooled an 8 Raspberry Pi cluster : r/watercooling
ModMyMods Raspberry Pi Mini Water Cooling Kit (MOD-0171) ModMyMods.com - PC Watercooling Parts and Accessories
ModMyMods - When we say we Water-cooled we mean all of it :D Our own #BIGKevin set up a little cooling unit for the Raspberry Pi - more details to come ;) #