Wall hammers are hard to keep.I’m sorry, I should have updated the thread. My hammer completely receded and died within a day or two of posting this. It was definitely not pooping, but that was a good suggestion anyways! The first time I saw one of my corals poop, I freaked out.
Turns out that I had some flatworms eating the hammer and once the fleshy parts were gone, I could see them all over the skeleton. Not sure where they came from since I’ve dipped everything and haven’t added anything new in at least 6 months. After the hammer died, the flatworms started coming onto the glass. My Yellow Coris Wrasse and Scooter Blenny have been tag teaming them but I’m still really sad about my wall hammer!