Just to push the point home... off topic somewhat, but here's my answer to the algae being kept at bay... that's all 5 tangs in one shot...oh wow I cant thank you enough for that really. so nice. im always jealz of large reefers they get the great fish!
your rocks are guided into self-regulating masses of corals and coralline, that's biorejection. the algae focuses on the glass where there is no bio rejection this is exactly like my tank.
when I leave it for weeks unserviced ill come home to opaque glass next time ill take a pic.
looks wrecked but its illusion
razor scrape + 35% wet the glass from the inside, it all comes off, and the rocks and coral are pristine. sign of an old/mature/ideal tank, biorejection right up to the glass.
