Marxous
I see you keep fish tanks, some very large ones at that. It was after years experience myself of keeping fish tanks and terrariums with mixed species that lead me to the idea of building my chameleon enclosure the way I did. Rather than trying to mop up or drain away excess water from the bottom of my tank I simply keep enough in there to circulate and filter like a regular fish tank. There is only a small amount of water in the tank itself and most of it is below a sort of floating island. Much of the water volume is contained in a large external Fluval filter which is really over kill as far as filter capacity is concerned, but I deliberately used a larger size filter to contain the extra water capacity in the whole system. My cleaning procedure consist of routinely spaying everything down and doing frequent water changes. Misting in my enclosure only helps to replace water lost through evaporation. I live in a very dry climate, especially in the winter time when we heat the house with a forced air furnace. My enclosure maintains a very functional humidity gradient, from hot and dry at the top to cool and humid near the bottom.
My design isn't for everyone and would never work for a female chameleon that's for sure, but I'm into the second year with this set up and it has been working great for me. My male veiled chameleon is healthy and happy, and the fish I keep in the water is doing fine as well. The pothos plant I planted in one of the hanging pot has grown down into the water area and rooted out, so the plant now probably gets most of it nutrients and water directly from there, thus it is acting as a sort of extra water purifier absorbing the excess nitrogen from the water.