sps turning green. help

[iceman86]

Originally Posted by Chris82

Corals have been in tank anywhere from6weeks to 12weeks . I just started into the spa workld about four months ago.
Corals are blue,purples mad a yellow one.

Your light is fine and as long as your getting enough light to them you wont have issues. Lots of beautiful sps tanks dont run full spectrum. I would try to lower those nitrates. My blues turn green when I let my nitrates get that high so i like to keep them at around 2. A lot of people run sps tanks with 10 nitrate just fine but every tank is different. Unless you added something that would add iron to your tank, I wouldnt bother testing for it.