Help with star polyps

[rholguin]

I have a colony of metallic green star polyps. The problem is that they are not so green they are turning brown. I have T5 lighting. What is going on. All my water par are good. Also where should I place it towards the top, middle, or bottom. please help.

 

[JetCat USA]

a shift in light spectrum is the normal cause, how old are your bulbs and are you using allot of 3000k/6500k bulbs??

 

[rholguin]

My bulbs are maybe like 4mths old. It has 2 10k and 2 acintic 460nb.

 

[JetCat USA]

water quality would be next in line but it usually takes pretty high levels of excessive nutrients to get GSPs to brown out.

 

[rholguin]

How about placement?

 

[JetCat USA]

nope, they keep their color in high flow, low flow, intense lighting and in the shade.

 

[bubblevssqueek]

In my tank i find that the higher the spectrum, the greener they are and vice versa. But its more likly to the fact that mine are under actinics.

 

[rholguin]

Well i moved them futher down in the tank and today they look a bit more greener than usual. They are starting to spread I guess this is a good thing.

 

[rholguin]

Thanks for the advise.