Sand filter base
When my pool was installed in 2018 they used one of the plastic base the sand filter sits on. The last couple years it started to warp and sag causing the filter to lean. After install my deck was built around the pool and over the sand filter and there is a hatch from above I can lift out to get to the controll head, I can also access it from the sides. Though about pouring a small concrete slab to replace the plastic base. I don't like the idea of messing with concrete under a deck just haveing to be hunched over under there. I have never messed with concrete but assume for something like this I could just dig out a few inches, build the rectangular form. Also thought about just screwing some treated 4x4's together or something similar and setting it on that. Anyone have any DIY hacks or suggesions?
The current plastic sits on the ground and after everyting was installed there was river rock installed all around.