My $0.02...
For my 300g REEF...I use a 200g sump/refg, tons of micro algae, 50lbs of M mud, 450lbs of LR (total), 200lbs of LS, G-4X skimmer, no bio balls....However I will run carbon in a bag maybe 1x's every 2 months for 48 hours just in case
For my 180g FOWLA...I use a 100g sump/refg, tons of...