Jun 26, 2018 #1 dlockert Community Member View Badges Joined Apr 24, 2018 Messages 56 Reaction score 92 Location Fort Walton Beach Rating - 0% 0 0 0 Anyone know what this is? It is sort of reddish brown and looks slimy, although I didn't touch it.
Jun 26, 2018 #2 cristata.reef Well-Known Member View Badges Joined Dec 20, 2017 Messages 884 Reaction score 735 Rating - 0% 0 0 0 Cyanobacteria. Nasty stuff; siphon it off or clean it with a toothbrush
Jun 27, 2018 #3 OP OP dlockert Community Member View Badges Joined Apr 24, 2018 Messages 56 Reaction score 92 Location Fort Walton Beach Rating - 0% 0 0 0 Ugh - thank you.