For some reason, my green star polyps aren't all opening up. I noticed that some stems have brown growth around them and then I spotted another patch that had black jelly like substance.
What is this? What do I do?
gsp will occasionally close up for days. gsp needs good flow and light. if u see any detritus settled on the gsp, point a powerhead at it to blow it off. r there any other corals having similar issue?
