Have these little red lines in some acros. Any ideas?
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I just dipped that one prior to taking that picture and nothing really happened to the dots. I scrapped at them with a fork too, think they're algae but these tiny red lines 3/8" appear on some and not sure what they could be. Dip and fork resistant red lines lol
Revive
Cyano can get very thin and stringy. If you have any growing in your tank small pieces can blow around and grab hold on stressed acros or ones with receded tissue. You would need to shake the coral vigorously or hold in front of a powerhead to get it to come off. I agree a clearer photo would make it easier to identify, if possible.Thanks! Not cyano though. Very thin red lines. Will not come off even with a knife.

