Yup it's just ambient water. The full loop consists of:
EK Supreme HF CPU block full nickel
EVGA X58 SLI NB/SB block
EK GTX 295 dual PCB nickle+acetal
Laing DDC 18W version w/ Watercool DDC case(top)
Bitspower 250mm res
HWlabs Black Ice GTX 480 w/ 4xUltra Kazes
Primochill black 7/16in ID x 5/8in OD tubing
EK compression fittings all over with a couple bitspower adapters
It's so cool. I would love to get a Rampage 3 Extreme though, but the block for it is $150 so for now I'm staying with what I have. (E758)
Just plain water right now, I'd like to get 800+ core but dunno if I can, when I put it to 802 with 1225mV it just shut down instantly at 3d load.