Algae ID help

wmv

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Hi everyone,
I’ve had this this layer of green algae (or maybe a green cyano?) growing for about a month or two. It started in just a couple of small spots but has started to spread more rapidly recently. It rubs off fairly easily with a brush or my finger but I’m struggling to figure out exactly what it is so I can better treat it. Some ID help would be great, thanks!

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