It's really hard to tell from the pictures. The green surface algae is likely normal algal growth - sometimes this gets replaced with coralline algae eventually. The bright, clearish green algae - is it little flat blades of algae? There's a form of Ulva (most likely) that's been popping up a lot recently. If so, what I found that eats it is most of the bubble algae eaters - Foxface, some Tangs, Emerald Crabs, and Pithos crabs. I've had some hermits eat it as well. Mine eventually went away on its own.