well Ive got something similiar going now with the cement. I used quickwall in my axolotl habitat build and its a waterproof cement, Ive got plywood involved as the structure but no cement board, instead 1 inch polystyrene insulation board rougheded up.
Idea is the same though using waterproof cement so if it holds up and I end up building a big tank I will use quickwall with antihydro over 1/2" cement board (killer bond and stiffness adder) time will tell whether the cement holds up and if there are any negatives.
Idea is the same though using waterproof cement so if it holds up and I end up building a big tank I will use quickwall with antihydro over 1/2" cement board (killer bond and stiffness adder) time will tell whether the cement holds up and if there are any negatives.