The tank dimension is 120" x 40" deep x 32" high. I don't touch the acrylic surface at all. All cleaning are done by 2 bristle nose plecos, a clown pleco, 6 Oto and a few other sucker fish. I am still stocking up the tank, currently quarantine elephant nose (8), panda garra (10), cardinal tetra (60), all species of Stiphodon gobies.