I cant say or reccommend anything for your size tank because mine is much smaller, but i do have a coralife on mine and i run it 24/7. most will say to run it sparingly. I do however scrape my glass alot less now, and ich in my tank seemed to have taken a back seat for now. I have it running through the sterilizer very slowly that way it nt only affects the algea spores but also the parasitics too. all this will be in your manual. I have added tangs also and before theuy would usually get an outbreak of ich, even just mildly, but that was the process, then they would usually pull through, recently though, with the last tang i added it didnt even go through that process,, i had no problems with the ich, not even blotchy fins. knock on wood...........