Its hard to tell what size tanks are on each rack. Unless I missed what was listed on each rack as a tank list? 
There are 4 35g and 1 70g per rack. Each tank has a full glass lid, and each tank is drilled, with an installed 3/4 threaded bulkhead.
The setup was designed to be a central drip, central drain, with each tank individually filtered, with multiple sponge filters.
Each 8 section of racks link together back to back, and side to side, with removable pieces of metal, which enable a space between the racks for air and water plumbing. When assembled, there is no movement of the racks.
Again, these are all never used, and still have that new tank smell.
