I’ve seen several of your posts inquiring about water features. It’s obvious you’re wanting to incorporate one into your build.
Have you considered making a viv with a water feature or paludarium and then housing something that would need and appreciate the water feature? There are many cool animals out there to fit the bill. I think you’d be happy.
Or
If you’re set on having PDFs; build a viv for your PDF(s) AND build a separate viv(or paludarium) with a water feature. I have built several vivs with successful water features and absolutely love them. I’m not a PDF keeper though. I just do plant-only vivs or paludaria with fish and shrimp (obviously plants too).
Successful(water and moisture well contained) vivs with water features aren’t always the swampy, soggy cesspools they’re made out to be. After a few well engineered builds, you’ll learn from mistakes and improve your design.
I think most of the negative connotations surrounding water features is that many new keepers try to recreate Noah’s Ark. Attempting to fit as many different animals in as small of an enclosure as possible. Never understanding their needs, requirements or basic husbandry. All this while trying to run a river through the middle of the enclosure on their first build.
I’m by no means implying that you’re one of these folks. All of your questions have been guided towards gathering info. You also graciously accept advice given to you. Those two things alone will get you where you need to be in this project and hobby.