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Looks like just short algae to me, rather common during the ugly phase

cheers thought it was cynoLooks like just short algae to me, rather common during the ugly phase
I know your tank is rather old now however IME, tanks tend to go through the uglies when they’re closer to 6 months in. I can’t figure out why however I believe it could be them establishing the nutrients for a more consistent period.
I don’t believe green cyano is in salt water and the ones we generally see in the hobby is red cyano.cheers thought it was cyno

