Mabey you could raise the floor in that area so the pipes go under it.
Would there be an issue having a predator tank tied into your reef tank, the filtration would need to be pretty on point to handle the load so it doesnt effect the reef tank?
That was more of a question than anything. The layout looks pretty sweet, and as far as the layout goes the 40 could be a very nicely made frag tan if you are into that type of thing.
The original layout has changed dramatically. I don’t foresee a need to have piping on the ground anymore. Also the need/desire to plumb the two tanks together is also gone. I will have two systems, they will just be separate.
Still figuring out how I want to set everything up, but there is the 240 and the 120 for display tanks. Then there is a 150 wave style tank for coral grow out (at this point ). Then the various tanks for QT systems. Still a lot of work to be done before water though.