dull sps

What's your lighting, nitrates, nitrites, calc, ammonia, mag, ect? without knowing the conditions in your tank we really cant do much to help you
 
your tank is listed as a softie tank, perhaps ou have too much chemical warfare going on for your SPS to thrive
do you use carbon?
 
Do you know your nitrates and phosphates? When you say dull, I am assuming you mean browned out? High nitrates and phosphates can definitely lead to this as well as not enough light. Most of the time, however, it tends to be PO4. You should shoot for 0.03 ppm or so.
How long have the corals been in your tank?
 
Well I would say you need to get your phosphates under control get your calcium and mag down a little through water changes and increase your photoperiod.
 
Lower mag to about 1300, calcium to about 440, and keep your alk stable where it is. Also as a general rule with sps, if color browns out give it more light, and if color pales give it less light. Get your water at those levels and keep it stable and in a few weeks I'd be willing to bet you will see noticable difference.
 
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