Doubling my skimmer or not

[Basile]

Well guys i'm bit post about my skimmer choice here. I heard a few things and that threw me OFF my game.

One of the thing I heard is to choose a skimmer double the capacity of my system. Like my system will involve a 140g tank with a display fuge of 75G so that's a 215 G total . So do I choose a skimmer for a 400 G system? The other one is about the recycling skimmer I had that, it worked well before any thought on that one is there a huge difference and why should I go there again.

A few things about my project. The 140 G is a Reef tank with LPS mostly and mushrooms and fish. The display fuge will be filled with a collection of Macro-algae and be split in two part; one with seahorses, the other anglers and scorpio fish, now both seahorses and anglers are messy and both tank are connected by gravity and are going to a 45 G sump as well.

So i'm looking at Octopus skimmers I like their concept. So double or just over the 215G; and should I go recycling again? Thank !!!