Sorry if this is a little off-topic (at least in the home theater sense), but I'm finishing my basement theater/club room, and was wondering if anyone out there has any experience with building a stand to support a fish tank in the wall. It is for a 72"x18"x22" 125 gallon glass tank. I would like the bottom of the tank to be about 4 feet off the ground. My plan was to just frame out the wall as I normally would, but where the tank will be put an opening (like for a door) with a header, and have 4x4's holding up the tank at every corner, and perhaps 2 more 4x4's on each side in between (front and back). And then lay 2x4's horizontally as a "cap". I was going to use pressure treated lumber, but someone told me not to do that because the arsenic in the treatment could eat away at a tank if it has a metal frame. Even if this is the case, wouldn't it be okay to do this as long as I put some plywood in between the tank and the stand? Also, I would like to be able to put a 37 gallon underneath it for DIY filtration, but won't be able to get it in/out if I put as many "legs" as I'm planning on. Also, if I don't use the pressure treated, what if I just use cedar?