Dec 10, 2020 #1 Steve089 Active Member View Badges My Tank Thread Joined Sep 1, 2020 Messages 122 Reaction score 225 Location Annapolis area Rating - 0% 0 0 0 have this thick dark brown stuff growing up the top of my rock work closest to the light, its hard to blow off with a baster, almost paste like, any ideas?
have this thick dark brown stuff growing up the top of my rock work closest to the light, its hard to blow off with a baster, almost paste like, any ideas?
Dec 10, 2020 #2 EvanDeVita Well-Known Member View Badges Joined Nov 12, 2020 Messages 903 Reaction score 519 Location Norwalk, Connecticut Rating - 0% 0 0 0 Hard to tell with lighting - I'd bet on Cyano
