hehe - i didn't tell you the really fun part

using a lot (read: metric crap-ton (R)) of high powered TEC's, create a sub-loop off the 50 gal tank (maybe a smaller 10-20 gal separate tank with its own chiller) for sub-zero benchmarking. using a double-stacked set-up to reach/maintain -50C should be possible (moreso if i can get the chiller to reach near-zero temps). i've been wanting to get into benchmarking and reviewing, and i probably will (at least in some capacity) once i retire in a couple/few years....but, for now, this is all just pipe-dreams - until i can turn it into reallity