i'm thinkin some tupperware storage containers reinforced with duck tape etc, along with an exacto knife......the only thing would be the connecting bridge in.....i could probably even get something to hang down in.....the tank's 12" wide i think........water level isn't very high though.....they were never able to figure out that floating dock thing....i had to go back to rocks........the middle of the tank has a reinforcement for the hood on top, which can be well utilized......i'd have to extend their current basking area so less swimming room to get enough room for a bridge.....if she weren't so fat/wide!!.....