Receding Torch Coral Huge Help needed

[Vgyoung]

I've had this Torch coral for nearly a year, and honestly it's been doing more than great. I got it with 2 heads, and just recently both of those heads is splitting into another head, so i was more than ecstatic to have 4 torch babies

After some observations I've noticed a slight recession in the base of the heads. Nothing has been altered to the tank (I.E. Flow or lighting) If something is wrong I really want to help out my Torch Any help will be appreciated
Params are:

Nitrates:Undetectable
Phosphates:less than .02
Calcium: 460
Alk: 8.7
Mag:1360
Salinity:1.026
Temp:79-81 range
PH 8.2

I have a kessil on the tank that reaches a max of about 70% I apologize for phone quality pictures
http://prnt.sc/a2em7g
http://prnt.sc/a2enhs
http://prnt.sc/a2epgs
http://prnt.sc/a2epuv

 

[Sk8r]

Only thing I can think of chemically is that you're running at the high end of the range in all parameters. I've had good success with euphyllias just a tick lower, at 420, 8.3, 1350 and 1.025. Can't speak to the lighting: no expert in that.

 

[Scorpius]

Your tank parameters run close to mine. Which Kessil do you have? I run my A360's no higher than 30% color and 35% intensity and my Electric Green Torch is doing great.