I just bought a used 55 gal tank yesterday too from another reptile site. I am adding two divider pieces of glass in the center, making a middle water area that will be 6" deep there is also a plastic covered metal shelving cut for a center divider that will go thru the water area. Then there will be an 18" coco fiber area with a hide and a fake fern on each end. One side will be the AFB Male, and in the other side is the Female Marine Cane toad. They cannot get to each other, though they are both pretty much the same size, yet it houses them both, one submersible pump filter for the water area, a medium heat pad on each end under the 4-6" of coco fiber. Broken flower pots stuck down in the dirt for hides. So not having to deal with two different aquariums for heat, moisture, cleaning etc. I will post pictures when I get finished with it.