Yeah, lately been chasing numbers on my Red Sea Max-500 (135g)....add several new fish, nitrates/phosphate must have got out of whack....algae appeared. Rock was clean as whistle when I only had a few fish. So I think I as long as you have way to export nutrients and keep algae in check....I wouldn't worry about exact numbers. I firmly believe that constant parameters what ever they are is key. My office nano tank took a dive this summer when we lost air conditioning. That was in July....lots of algae growth, dead fish, ammonia spikes....after doing a good 50% water change before thanksgiving I came back to a tank with everything open and thriving and algae is disappearing. I am using Red Sea NoPoX to keep tank in check. Currently only have clown and bi-color basslet. Tank is looking swank now :-) Gonna let it settle down till first of year then look to add some new corals and maybe couple more small fish. Home tank is still a work in progress....the NoPoX is working, just more water, gonna do extra water changes and filter sock changes. Skimmer has been in overdrive. Bacteria should be catching up soon since it's been about a month now since I last added last batch of fish....tangs....heavy polluters :-)

