Torch head shrinking

[reefernz]

Hello reefers on my torch coral one head has started shrinking as you can see in the pic and the polyps have started to a bit colorles. This has been going on for couple of months on that one head. Other heads seems to be fine. Any idea what this is?

 

[Mr. Mojo Rising]

It might just be getting shaded out. The polyps on the bottom of my hammer colony are smaller and thinner than the polyps that get more light.

 

[CookieM]

I would start with some parameters checks. Make sure your alk, no3, po4 are all good and stable. It could be anything really, or nothing at all. Can't really tell from one single picture