birds nest coral polyps not coming out

[Colin Gilboy]

so i’ve had some experience with SPS particularly birds nest, i knew i had succes with them in the past so i wanted to buy a larger birds nest to go in my display tank. all my other corals (mostly LPS) are doing great, but my birds nest which i’ve had for about 4 days now i still haven’t really seen to many signs of polyps, im doing Calc, Alk, & Magnesium, as well as trace elements and acropower, anything else i can do differently. i also have a power head pointing directly thru the center of it and have it up in higher lighting since it is a pink birds nest. any tips or advice? PS THIS IS MY NIGHT TIME LIGHTING, THIS IS NOT WHAT I AM GROWING THIS UNDER DAILY.
temp 77.6
salinity .025
ammonia 0
nitrite 0
nitrate 0
Ph 8.1
90 gallon tank

 

[Backreefing]

Alkalinity? Is a big parameter

 

[Backreefing]

Nitrate at 0 is bad to , what calcium and mag are you running.
They like flow . if you can don’t make it constant but pulseing or turbulent ( swirling, back and forth ) and be certain it isn’t to strong .