What is this?

[mcpiper]

Saw a couple of these green things growing in my tank. I have no idea what it is. Any guesses?https://uploads.tapatalk-cdn.com/20190302/7aca71b118435d345d150074d7d9ecd8.jpg


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[spit.fire]

It’s some sort of macro algae

[H2o2]

Google banana algae

[smokinreefer]

It's neomeris annulata.

[hillegom]

It takes calcium out of the water like halimeda