Whats with Coral masters fiji fever?

[daniella3d]

I have experienced this often. I don't have a ULN system and when ever I buy corals that are from low nutrient and bring them in my tank they get very dark.

I bought a blue sps frag for 50$ and it turned dark brown and never returned to its previous glory. All the pastel color SPS coming from ULN systems usually turn dark when there is some nitrates and phosphates.

So now I only buy frag at lower price and I stay away from those that come from ULN system because I know for sure they will darken. Not that I don't have nicely colored SPS, I do, and some are quite light in color but when you get them from tank that are not ULN you can see the final color better.