Hey all,
I have a hammer that’s not opening, and it has a dark, jagged, stuff, and crusted on its stem. I’ve read threads about algae, but I assume the algae would be soft, but maybe not. I’m pretty new at this. This stuff is hard like tree bark.
I have another hammer in the tank that’s fine. Its stem is smooth.
Wondering if I should try hydrogen peroxide in case it is some kind of algae and try to scrub off just the stem.
I’ve attached a picture of the affected coral, my other hammer that seems to be doing fine. And lastly a cyphastria. Is this thing dead? I don’t see any polyps, but it still has color on the base. It used to have small, yellow polyps.
Thanks for reading![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![IMG_5142.jpeg IMG_5142.jpeg](https://www.reef2reef.com/data/attachments/3440/3440532-46dfee9efe8afecc40fbd8b971c69ae2.jpg)
I have a hammer that’s not opening, and it has a dark, jagged, stuff, and crusted on its stem. I’ve read threads about algae, but I assume the algae would be soft, but maybe not. I’m pretty new at this. This stuff is hard like tree bark.
I have another hammer in the tank that’s fine. Its stem is smooth.
Wondering if I should try hydrogen peroxide in case it is some kind of algae and try to scrub off just the stem.
I’ve attached a picture of the affected coral, my other hammer that seems to be doing fine. And lastly a cyphastria. Is this thing dead? I don’t see any polyps, but it still has color on the base. It used to have small, yellow polyps.
Thanks for reading
![IMG_5135.jpeg IMG_5135.jpeg](https://www.reef2reef.com/data/attachments/3440/3440530-c2c9f9ae36529d6cd1f2d6678cf50f5f.jpg)
![IMG_5140.jpeg IMG_5140.jpeg](https://www.reef2reef.com/data/attachments/3440/3440531-e5177f87f2c475038c9f53131ec9ddce.jpg)
![IMG_5142.jpeg IMG_5142.jpeg](https://www.reef2reef.com/data/attachments/3440/3440532-46dfee9efe8afecc40fbd8b971c69ae2.jpg)