I recently purchased some non-aquatic peace lilies. They were being sold as fully aquatic Brazilian swords. Long story short, they needed a new home! Here is a shot of them in the tank. They started to die immediately.
So I picked up a fridge storage container. Basically, just a clear acrylic tub. Any acrylic tub, pending size, will work. Mine is 4"x6"x14" and runs around $10.
I trimmed it down on 3 sides to about 3" tall instead of 6". I left the back at 6".
Instead of suction cups, which I also bought, I opted for a ledge to hold onto the tank since I have a rim. A heat gun, space block of wood, and some gloves made a quick bend. It is about 1" wide.
I then drilled a bunch of holes. I tried to make them uniform for visual effect, but it doesn't matter.
Here is a quick proof of concept. The tub hangs!
Back outside to clean up the edges and then wash it out. Here it is full of rock, inside of the tank.
The plants are planted and enjoying the bog setup much more than the submersed set up. The roots are in the tank water.
This is just a cheap DIY I wanted to share in case anyone ran into a similar issue.