Ah I see, thank you

the height is custom so floater stuff will always be like this (that's how it is i can't change that) for bottomdwellers i can check but i personally never experienced that.

I've tried the tank & it was pretty good & amazing cause it can hold more fish.

But my concern is that when I put bottom dwellers like crustaceans, they seems half buried tho.
Then the floater plants seems half submerged too.

Can you fix this by maybe raising the bottom tank to it's substrate height & also adjust the floater placement to the appropriate place at the water surface?