Tips of Birdnest Coral turning brown?

[willforr]

Just today I noticed the tips of my birdnest coral turning brown. I’ve had it for a few months now with no issues. Any idea what could be causing this?
My parameters are
Nitrate: 5-10 ppm
Nitrite: 0
Ammonia: 0
Alk: 10
Calcium: 420
Phosphate: .03
Salinity: 1.024

 

[GoVols]

Lower your alk 8.5 to 7.5

Meduim water flow and make its not under to much par

 

[PokeFish]

It kind of looks like diatoms or some kind of algae/bacteria growing on it. ensure it gets enough flow

 

[Duffer]

Most likely the tips are dying and algae is on them now…could be too much light,alk swings or even phosphates swings…
your alk is high for low nutrients

 

[willforr]

my flow and light are quite strong. Would you recommend I move it somewhere with less light? I can also try lowering alk but I haven’t had much swings with it