Just throwing in 2 cents about the sides, one thing I did to keep insulation in a bit more was use Cinefoil, a tool used by us filmmakers to shield light and shape it. It's essentially aluminum foil painted matte black. It's not cheap, but I have never had a problem keeping heat in the tank, day or night.

Tank, with 3 sides with cut Cinefoil, a piece covering half of the top on the mesh as well.


Not only does it insulate, but closes up the tank a bit, and looks pretty good too (my editing room is dimly lit anyway, but still)

Cinefoil:
http://www.amazon.com/Rosco-Matte-Bl.../dp/B001KVMK38

You could possibly find some smaller rolls, but the stuff is just plain useful.