The vining plants may work on the 2nd level… I use some nylon string, and screw in brass hooks to tie them up , and route them up and between tanks… as I add the new 24/7 led lights, to my tanks, and replace my 18 inch plant led’s that are / were on them, I’m going to mount those on the ceiling of my work area behind the tanks, and encourage the vines to grow into that open space… getting 8 - 10 foot vines growing out of the tanks, will pull an awe full lot of fish waste from an aquarium… I’m getting to the point, that I don’t “need” to do water changes… I still do, but if I get busy, and needed to skip one, it wouldn’t be catastrophic