Hammer coral

[frankin09]

Is my hammer okay it shrunk today. I just did a water change on Monday. These are my parameters. Ph:8.0 Nitrate:20 Alk:9
The first 2 are how it looks right now and the last 2 how it usually looks.

 

[mdb_talon]

It seems fine. Keep an eye on it receding from the edges or not opening at all for extended periods of time and thats when to get worried