crabs new 24" cube

[i have crabs]

i thought about making it removable but with a vortech on the back wall i want it to be on the glass,
the guy with the 5g spent a whole lot more time than im planning with this i just dont want a big glass wall at the back of the tank covered in crud all the time, at least if its rocks im hoping it wont look so annoying plus this will help stacking rocks giving a bit of grip on the back wall instead of just glass, ive been waiting for some black acrylic to cover the overflow but i think if the rocks are fairly tight together it wont realy mater if the overflow is covered once all the cracks between the rocks get a bit of coralline it should fill in alright,
i guess im gonna have to buy a few good sized chunks of rock now also, it always hurts buying big rocks,spending 2-3hundered and having 3-4 rocks really bites