GSP loosing it's vibrance?

[tank41]

Hey guys I have had the same mother colony of gsp for over 4 years now with many other colonies started from this one. It is a metalic green gsp and I have 3 pretty good size pieces all placed in different locations in my 135 gallon tank. It is lit by two 250 watt radiums and two 80watt t5 actinics. All 3 major colonies are very dull in appearance unlike the vibrant metalic green it was showing up till about a month ago. The only thing I have done different is ramped up my feedings because I added a vlamingi tang that is very large. All other lps, sps and softies look fine just have never seen this dull color before. It was about a month after the addition that I noticed this. My metal halides have been running for about 14 months. I hopefully will have some new ones in the budget for next month. Any ideas? Params look fine.
Thanks for your time.

 

[Turbo snail]

are they still opening and closing normally? If the only difference is that they look dull I would attribute that to your bulbs being old. GSP should have no problems growing still, but to get that sheen back you will probably need to replace them.

 

[racedout]

Old bulbs I would think

Sent from my SGH-i917 using Board Express

 

[tank41]

Yea that was my first thought also. But all other corals lps and sps look like they allways have. Definately time for bulb replacement.
Thanks