Bubble gum digitata, no green tips?!

[cwk84]

I've purchased a large frag of someone's colony a couple days ago and the tips looked super green in his tank but in my tank, they don't. Is this a normal stress reaction from the change in water parameters or do the tips change color depending on the spectrum? He had T5's and LED's I only have T5's. Any input is appreciated!

Salinity 35ppt
NO3 10-20
PO4 0.03 - 0.06 (depending on how much I feed)
Temp 77-79
Alk 7.5 (as of this morning)
Ca 420-430ppm
Mag ~1400ppm

Currently, I'm utilizing 5 bulbs in my 8 bulb setup (I ordered a different daylight bulb so it's only 5 for the time being). The brand is Giessemann. I have 2 x Super Purple, 1x Actinic Blue, 1x Super Actinic, 1x Aquablue Coral.

 

[BoomCorals]

Yea this can be normal from stress.