My experience is limited to T's and a hognose viv. The bio active T's enclosure I had like you dips that placed the substrate into the water. This became a problem, the substrate became saturated from wicking everytime it was raised. When allowed to dry out the system started to crash. It became clear that I had to even it out. I added to the larger stones I used the hydroponic balls and used them to even it all out. This in the end was far better. I would suggest sooner than later as you don't have as many established plants and such. As time passes it becomes a bigger and bigger job.
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