my Red Sea 650 (150G + 25 G sump) reef is pretty simple. i run a 2 stage CA reactor, skimmer, and bagged carbon, nothing else. weekly to 3x/month 30G water changes using RS Coral Pro salt.
i have 5 wrasses, 4 chromis, 3 med tangs (hippo/blonde naso/yellow), 4 firefish, and 1 clown. i feed a sheet of seaweed daily to the tangs and a quarter size piece of frozen mysis/rods/bloodworms 1 or 2x daily for everyone else.
post cycle i've really never had any algae issues, though i personally believe that is because i never run red or green spectrum, white spectrum only occasionally, and mostly blue/violet/royal and UV.