Hammer coral problem

[Noobreefer1]

Hi,

this is the third hammer this is happening to. It is pulling away from its skeleton. Anyone know what causes this?

 

[mdb_talon]

It can be just about anything. Disease, bad parameters, high flow, starvation, pests etc. Often a combination of those things....like bjd which seems more likely to impact a stressed or damaged coral but then spread to otherwise healthy coral.

Anytime I have unhealthy looking hammers or torches I usually dip and look for pests(specifically polyclad flatworms) and then give it a high dose of antibiotics(in a bath floating in tank to keep it at temp) for anywhere between 8hours and 3 days(changing water/antibiotics at least twice daily)

 

[Uncle99]

Unstable water chemistry.
Seeing some algae growth in the pic makes me think phosphate to high at the least.
What are your parameters and how long have they remained stable?