Has anyone designed a cage that has an integrated water tub with a drain that goes to a water pump/filter and then dumps it back in? Also, I was playing with the idea of putting vinyl flooring on the ply to help with cleaning. Not to sure about this idea though. I really want to automate the water in the cage. Any suggestions like what pumps to buy would be apprecited. My current cage is 6' x 4' x 2'. New cage I plan to increase the depth to 3'.