Anyone have any insight on this Acro? Mine will NOT grow. I am getting growth from all of my acros except for this guy who has been pretty dormant since I got it. It hasn't even started encrusting. Higher light than most? Direct flow? Parameters are good. Phos .05, Nitrate about 5, ca 410. Alk 9.6, salinity 35 ppt. Mag about 1400.