OK... so here is my idea for a waterfall.
I will make a small drainage hole in the back corner of my viv and put a proper aquarium into my cupboard at the bottom.
The pump itself will be in the aquarium and go through another hole to the waterfall.
That hole will be sealed via silicone.
Both holes will be behind a fake rock wall, so Azura wont be able to get washed down by accident.
The Vivarium will not be as wet as normal, plus I got easy access to the pump and if I ever want to replace the water it is also easily done... just put another pipe into the pump, drain the water, and and just put new water in afterwards.
0.1.0. Wildtype corn snake