Need some opinions on sump

[Williamthegr88]

Hi I'm setting up my 43 gallon redsea reefer here are some attached pics of how it is set up and where My protein skimmer will be need some opinions on how to improve it

 

[Joeganja]

What do you want to improve? Do you plan to keep any reactors for carbon, gfo, etc.?

 

[Elegance Coral]

I would remove the black sponge and add a GFO and GAC reactor.