Coral problem

[Hammer fish]

can you please help me to help my coral

 

[54seaweed]

View attachment 203209 can you please help me to help my coral

Well tell us your issue along with water parameters

 

[Hammer fish]

This coral has white lines all over it water seems ok nitrate is a little high is it going to die or can I save it

 

[54seaweed]

if trates are high I would do a water-change to bring them down

how old is the tank
and how long have these lines been showing up

 

[Hammer fish]

This seems ok this morning I just changed 50l of water so looking better now