As you can see there is some kind of black encrusting sponge i'm guessing on this frag plug, the zoas slowly started closing a little more each day and havent opened in about 2-3 days.
Anything I can do? razor blade?
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Finger and fingernail.
Or ball point pen. Should come of very easy.
Well, to be honest, I don’t think that’s what’s making the zoas close up. The black white and yellow sponges I get on my zoas has to get pretty deep over the polyp to make em not open.
If it’s not coming off with a finger or toothbrush, I’m not sure I know what it is.