Getting rid of blue cloves?

[daniella3d]

I wish I could tell you why they are absolutely not growing in my tank but they don't. I use carbon filtration and I have read that this can slow down their growth or even kill them. Dunno if this is the case with both my aquariums but they just don,t grow. I have lotst all my clove polyps, green, blue whatever, and now even losing some that were given to me with the mention "be carefull it will spread like mad" but it's dying.

I have mixed reef with sps, lps and soft...Nothing is perfect..I wish they would grow like mad in my aquarium.