I'm no expert, but the first and last pics look like regular green hair algae. The middle pics look like bryopsis which was much worse for me Not hard to get rid of, am ke sure you use RO/DI water with 0 TDS, get a good clean up crew, increase flow, clean filter pads and skimmer, use GFO, and keep up with water changes. Sounds like a lot, but it's worth it!!! Bryopsis is tough, but I had luck with manual removal, raising magnesium with Tech M, and a peroxide dip for some rock areas. Good luck!!
Yea kent tech m only thing that worked for my on bryopsis. That dino fligates water changes ive only seen it new tanks and my fuge once or twice. Maybe to heavy of bioload? Causeing phosphates