Is my sump sufficient?

[digleftnose]

Hi guys. From the look of my sump, do you think that it is sufficient for a 422 tank? Do you have any suggestion on what more I can add to improve?

Currently I have a 300 gal capable skimmer, rubbles, refugium.

[erikokelf]

Your sump look very decent already. As for being sufficient for 422 is very subjective dependent on what you intend to keep.

But there's always water change to help keep parameter in place.