Feb 9, 2021 #1 NYBumkin Active Member View Badges My Tank Thread Joined Feb 1, 2020 Messages 123 Reaction score 93 Rating - 0% 0 0 0 Just the purple algae/bacteria on the flat surface of the rock. Thank you!
Feb 9, 2021 #2 Saltyreef I'm not your dad... View Badges Joined Nov 25, 2018 Messages 7,042 Reaction score 6,046 Location Central Coast, California Rating - 0% 0 0 0 Looks like cyano
