Black Moors are coldwater fish, SAE's tropical. They are not compatible. If the algae looks black and hairy, then it is very difficult to get rid of, (it is actually a red algae species).
It is not particulaly Iron that encourages hair/beard algae. Any nutrient surplus encourages algae. I also have highly enriched Iron substrates, but in heavily planted tanks, nitrate and phosphates are limiting nutrients, so no algae.
High Iron doesn't equal hair/beard algae.