Snails and algae blennys can get rid if it but to stop it from hopping I would find out the source. Prob have high phosphates. Even if you check it and it reads 0 there is still phosphates in there. The algae is using it up and will not show. You can do mare water changes and try it get most of the green hair algae out manually. Or you can get a phos band reactor. To little fishy's makes a good one. I'm speaking from experience because I had green hair algae all over.