Good to hear, my plan is to make it a water feature/hide with the pump hidden in the structure so it can only be seen when I take the whole feature out. Do you think the noise of the pump will keep him from using this as a hide or is the hide a bad idea?

Other info, I plan on starting with a foam block as a base. Ill carve it in a corner so its tight then cover it with hydraulic cement to shape, mold rocks, plants and other things into it. I plan on having a pond like bottom so it pools and he can soak. Any suggestions on anything else?