whats wrong with my GSP?

[APrince62]

I hope I put this in right heading ...if not feel free to move....so I got 2 frags of green star polyps at the expo....loved em ….opened right away ...nice movement....looked good....then 2 days ago they quit opening....water parameters all are same ...no changes,,,,i am due for a water change this weekend. So this morning part of one partially opened.....took some pics …..any clues?

 

[James M]

Looks like algae on the polyps
Also sometimes coral take awhile to open up if newly introduced

 

[wesman42]

What are your actual tank parameters? Alk, Calc, Mg, phosphate, nitrate, salinity and temp?

 

[APrince62]

temp 78.1, salinity1.024, nitrate 10, alk 80, phosphate .05....don't have test kits yet for calc or mg

 

[Fish4udog]

Run by tank kh9,ca 420,po4 .04,no3 .5 & mag 1395 run light 8hrs