Its slimy for sure but compared to the stuff i see at work and pretty much everywhere on the internet, it doesn’t look at all like cyano. That’s typically a much brighter color isn’t it?The green algae on top ... is it like a weed with fronds on the top of each stem? Or like a grass where every stem is perfectly straight? Or is it slimy and not like a grass at all?
If fronds (which it kind of looks like) that's bryopsis. Don't try to scrub that or treat it with anything other than Fluconazole or nutrient starvation. It will only spread.
If it's slimy it's probably cyanobacteria. You can scrub/remove that.
If it's hair algae, just keep upping your CUC until they keep up.
In every case, get your nutrients in balance. Water changes will lower nitrates but won't affect Phosphates at all. If you need help with that, just ask.