I need to upgrade my filtration on my 220. My guys are growing and the Rena xp3 and xp4 arent going to be good enough soon. I have a cellar? underneath my house. Basically a 6 foot earth floor unfinished basement, brick walls. I got this idea from the man i bought my tank from, he had a HUGE filter setup by going through his floor to his basement. I will be going through a now unused air vent in the floor under my tank. I want to finally use my overflow to go to another tank, likely a tub, in the cellar on a stand that will be a huge filter. The problem i have is I think I will have drastic heat loss going into the cellar. Will the thick walls of the tub save me? And wrapping the hose in pipe insulation? My biggest concern will be the winter. I think although it will be hideous I will just go insulation crazy. Anyone see any problems with my proposed setup? He is a crap sketch to visualize.