You think??? It's just going to be the tank and sump.
It says for a heavy stocked 130g min and I think 200g lightly stocked.
i never go by those estimates on their website...........i usually see what other people are running them on to get a better idea.
i mean, the AP600 will work........what is your total system volume gonna be?
but if you ever get to the point where you have several tangs in the tank.....you'll find yourself emptying the cup daily. you may even find that just with 100lbs+ of live rock.