Torch coral

[hectat2]

Hi my torch coral today have a white spot in one of heads any help is welcome water is good temp on the tank sometime is 79.6 mayor part of the time is 78.4 ph is 8.0 to 8.2
Ammonia 0
Nitrite 0
Nitrate .5
Phosp.03
Calcium 400
Alk 8.1
Mag1300

 

[hectat2]

Well I done fresh water dip for 1 min and reef dip for 30 min and look like is work thank for looking

 

[Reefrookie220]

I find these guys get those spots or don't act happy at all if in to.much flow. The tentacles won't extend fully or they will rub against the hard skeleton and get bacterial infections.