Managed to get all the live rock and live rock rubble out of my refugium section. I have one of the manifold outlets emptying excess flow into this section, but it seems I didn't have it angled properly... because once I pulled out the macro and all the rock... it was sick!
I'll have to get to the skimmer compartment tomorrow, because I only had enough water change water on had to replenish what I siphoned out of the refugium section.
After: