You're not using GFO, are you? I killed several hammers using GFO. They didn't die quickly, either. Slowly recessed. Took months for them to die. First I thought it was flow, then lighting. No more GFO and hammers are happy.
Thanks for all of the comments and links. It helps expand my understanding.
I got into reefing almost 365 days ago. I did it to lower my work stress. While very enjoyable, I did not think I would stress this much over "just coral". These little guys have become family pets.