Jul 6, 2020 #1 Perthegallon Valuable Member View Badges Joined Mar 13, 2020 Messages 1,944 Reaction score 728 Rating - 100% 1 0 0 Is this coraline it has the plasticity feel when removing it
Jul 6, 2020 #2 AcroNem 2500 Club Member View Badges Reef Squad Excellence Award My Tank Thread Joined Jan 1, 2015 Messages 4,469 Reaction score 14,518 Location United States Rating - 0% 0 0 0 Nope. Other algae, could be Cyanobacteria just between the sand and glass.