API AlgaeFix is pretty effective on hair types. I'd try that first, following the directions.
Then you're gonna need to find the root cause, whether it be nutrient imbalance (too much of something or not enough) or too much light, inadequate co2, dirty conditions, etc
You can do both algaefix and excel at the same time. Excel and peroxide doesnt do much for hair types in my experience - unless you spot treat but you have WAY too much algae for that.
My course of action would be
Get in there and manually remove all you can. This will take some work. Swirling a toothbrush around the long stuff like spaghetti can help pull it out. Clean the filters. Vacuum the surface of the substrate. Do a 60-70% water change.
Do the Algaefix following instructions. Probably take two rounds.
When that's done do another good cleaning and water change.
In the meantime try to learn what cause it in the first place.
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