Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I have several of the garage organizing stands sold by Home Depot.
They could stand up to 6' high, but the legs are in 2 sections, 3' each, and I use them that way.
The set comes with 5 shelves. This is a bit crowded, no room to access the tank for maintenance. I just use 2 shelves on each 3' high set of legs.
They are sturdy, and have no tendency for the system to shift diagonally when the shelves are in place.
My only problem is that the shelves are unpainted particle board. I have replaced them with painted, exterior grade plywood. 1/2" for tanks up to a standard 29 gallon. Even tanks that do not reach the sides or the main supports of the shelves are not making the plywood sag.
I have several tanks on CMU blocks. Mostly 8 x 8 x 16, and they are very sturdy. One way to use these is to set up one pair, then lay a shelf across these. Make sure the shelf fills the whole block. Then a few more blocks, and another shelf. I would not go higher than 3 blocks in a stack without the stability of a shelf connecting the whole structure into one unit.