little_fish
Moderator
you can add as many as you like as often as you like because they dont effect the bioload like fish do. And you dont need to wait until you have all the fish in there to add corals, IMO some corals are easier than fish. I would start with soft corals and if that goes well, branch into LPS corals, and if that goes well, then I would look into keeping SPS corals. LPS and soft corals are very forgiving of the high nutrient conditions found in new tanks, and handle the changes a young tank pretty well. SPS are much more picky of lighting, water quality and how stable the system is.