Jul 6, 2023 #1 R ReefDaddyz New Member View Badges Joined Oct 26, 2020 Messages 18 Reaction score 13 Location Philadelphia Rating - 0% 0 0 0 Can anyone identify the black spots on the frag plug? I have it on multiple plugs and some rocks. Thanks.
Can anyone identify the black spots on the frag plug? I have it on multiple plugs and some rocks. Thanks.
Jul 6, 2023 #2 SGV - Bluestar Community Member View Badges Joined Jun 26, 2023 Messages 90 Reaction score 67 Location SGV Rating - 0% 0 0 0 Probably Cyano.
