Zoa help

[cassklar]

I have some purple and red hornets they are under two ai sol blues LEDs the problem I have is the open about 3/4 but they show no color or the red or purple ring design on them I have them about half way up on my tank all my other zoas are doing fine and there is this brown stuff on them can somebody help out with some advic thanks

 

[organism]

How long have you had the LED fixtures over them? What does the brown stuff on them look like, can you get pics? Can you dim the whites and the blues independently? For now I'd say move them to the bottom of the tank, but make sure they're still getting decent flow.

 

[cassklar]

I have had my lights now for 3 months and the brown stuff on them look like brown algae I have already move them to the bottom so I guess I will see what that does

 

[cassklar]

here is a picture the reds on top blue in middle and purple on bottom i have them two ai sol blues in a 72 gallon tank thnaks they are in thee center not directly under light