Mar 30, 2020 #1 USMA36 Valuable Member View Badges Water Gap Reef Club Joined Feb 5, 2017 Messages 1,172 Reaction score 476 Location Northeast PA Rating - 0% 0 0 0 This maroonish algae has been showing up. Cyano? It doesn't brush off like I thought cyano did.
Mar 30, 2020 #2 ndrwater 2500 Club Member View Badges Excellence Award Reef Squad Emeritus Hospitality Award My Tank Thread Joined May 7, 2015 Messages 3,880 Reaction score 8,020 Location Anaheim, CA Rating - 0% 0 0 0 Looks like Cyano, but if it's hard to the touch, it's Coraline
Mar 30, 2020 #3 xxkenny90xx 2500 Club Member View Badges Pacific Northwest Reefers Joined Apr 2, 2019 Messages 4,654 Reaction score 6,045 Rating - 0% 0 0 0 Red coralline! I have the same stuff. It looks just like cyano but doesn't come off