What skimmer is it. The little air stone one? IME. Dump it. HOB or tunze. Just not strong enough to pull larger particles(wet skim) and doesnt produce small enough small bubbles for fine(dry skim).
IMO IME keep the chambers a clear as possible, they just become detritus dumps. Leaves room for a small bag of gfo and or carbon to hang so it gets flow.
The first sponge is a good idea, works like sock in bigger tank(first particulate filter) and should be easy to change. And as much of a fuge/chato nut that I am, in the chambers the just collect gunk.
The chambers buy their nature are gravity filters(heavy things fall down and settle, also why you have algae in the front). Only thing to keep an eye out for on them.
As far as the flow goes look at the corals. If they are happy. dont mess with it. Before you change the flow, see if moving the coral will work first.
If it is too laminar(l to r) like my 28g cube put a small head opposite the main flow. Creates turbulence.