I also have a small square piece of eggcrate left as well. What my fiancee was thinking was move the long slope piece more towards the middle of the tank so it is away from the waterfall, and use the small square piece for something else, like a ledge attached to the waterfall. I was also thinking about making the slope just as land instead of a stream. Then I would take the small square piece and have the hose for the waterfall come out and poor water into a pool (made from the small square piece) and then have it overflow into a waterfall. This would create another area for them to soak in. (Does this make sense? lol). Any thoughts?

I will be going out this coming week to get the foam and start creating the waterfall and the rest of the tank. I will also need to pick up some tubing for my pump and make sure that it works and see how quickly it is pushing the water.