I put that light I was talking about on to the tank and now about a week later he has doubled in size with large folds. back to usual thanks for all the helpOnce and if that becomes a problem we'll help you solve it. It might not be an issue. Nutrient imbalance is usually the problem with the algae. Also, don't be afraid of having algae, it's a normal process that can be addressed. Your goal is to keep animals alive, they don't care if they have to live next to algae vs dying in a pristine tank. If you want to keep that nem in good health and add other corals, I would definitely add a serious light to the setup. At least something like viparspectra. Also, I think you'll like your tank much better with that light on.