Zoas lighting and color?

[bigkai]

Ok so I can't handle my self in addicted to zoas now my question is are they getting to much light or not enuff some of my zoas are changing colors like these. Spidermans I got about 2 weeks ago their growing great and are doing really good but the skirt has changed colors and is very dark now

 

[bigkai]

Before

And now

 

[bigkai]

Anyone I know theirs lots of zoas keepers here any ideas.

 

[EW_Fish]

I'm not a 100% on this
But
Corals normally look different due to water quality and lighting. I know if I place my Candy apple red at the top they bring out more color then if I placed them at the bottom.

 

[bigkai]

All my zoas are in the sand right now. As for lighting I have a 6 ati t5. Bulb retrofit I built and 42. 3watt leds retrofit I also built and the leds are turned down to about 20% power. Alk 8.5 cal420 mag 1400 ph 8.2 nit 0 phos0 temp 77.5 swings to 78.8 mid day

 

[bigkai]

Well do you think to much light or not enuff

 

[bigkai]

Any thoughts???

 

[Rob&Gab]

bake them under the light. Also how far down are they? it could be to low nutrients in the tank as well but i dont no.

as he stated with candy apple reds. when i put them on the bottom the get really fadded. But when i cook them right at the tippy top the blast out bright neon red and glossy look not the flat red look.

 

[bigkai]

Tank is a 120 tall so the lights are are about 31 inchs from the sand 24 inch tall tank. lights hang about 7 inches above water