new sps curious

[reeforlive]

Hi, I just some new sps. I am excited to see some white tips. However I am not sure if they got burn or actually is growing. The tank is 5 months old and All parameters are in checked.
po4 .06
alk 8.5
cal 450
nitrate ~10.ppm
ph 8.1

 

[SliceGolfer]

Looking good!