I definitely agree that macroalgae is the answer to keep some algae undercontrol. I have figured that out, at first I had my tank setup and then added a rock that had grape cauperla over it with zoos, the a few weeks after adding it you could tell the macro took off and filled the rock entirely and choked out the zoos. I then removed it to get rid of the algae, since my tank is a small nano, well what you know, got the macro off, but in turn killed the zoos i guess from scrubbing too hard. Then whole tank went to crap. Started over using the live rock and misc corals I had, reset it up and got rid of dead stuff. WEll what you know algae is bad again hard, been a month or so, and ammonia levels are undectable, so I'm heading off today to get some more macro algae, and hopefully can keep it under control this time.