First I drilled a hole in the bottom of the container for the water port.

I cut the bottom off a round container to make the water bowl.

Unglazed or bisque ceramic tile.

I rounded the tile, and bonded it to the bottom of the container over the hole. I then bonded the water bowl to the bottom of the container around the tile, making sure it was sealed all the way around. After that, I poured a layer of Hydrostone in the bottom of the container, and a thin layer inside the water bowl, filling in the small gaps on the sides.


Added some substrate and decoration.

Now I have a water bowl that stays wet for months, while all the other substrate stays dry.
