Great growth but no color

[tnyr5]

Ah, this is an easy fix, just move them both lower in the tank. That's just what setosa and pc rainbow look like in high light.

 

[Travis Stewart]

I would like to know Your potassium value.
What i wrote before was about colors in white light.
The colors in blue light is a bit trickier because they come from fluorescense.
You must both have the right substance in the coral to give the fluorescence and light of the proper wavelength.
The fluorescence substances act a bit like "sun tan" = protection against strong light so it will be more of them in stronger light.
But they are also dependent on the wavelenght of the incoming light.
Red is often from about 470 nm and green from 455 nm but thats just "often".
Mike Paletta has written a few articles of color coloration thats very informative. They are in Advanced Aquarist and difficult to find but they are there.

I have never tested my potassium except for a recent Icp test but that’s been a little while. I will retest and post. Thanks for your response.