- Joined
- Sep 20, 2016
- Messages
- 233
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- 75
Hey guys I have this black stuff (I think it’s some form of sponge) growing on what used to be a large colony of Hammer. Lately the sponge seems to be winning the battle and I think irritating the coral enough to the point I am starting to lose heads. Anybody have any experience with this or know what it is/ how to combat it? Thanks in advance.




