Submersible Pump Housing

I bought a tiny water pump (link below*) for a terrarium I'm making for one of my pets. I wanted a waterfall feature but I wanted to have the rock wall/pile on something other than right on the pump, and wanted to keep the pump removable and replaceable. So this is what I came up with. Still might need some tweaking, but so far it works for me. Any constructive criticism is welcome.

* https://smile.amazon.com/gp/product/B07SJGKFT7/ref=ppx_yo_dt_b_asin_image_o03_s01?ie=UTF8&psc=1

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UPDATE: REV. B 02/26/2022

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