pale colours sps

[chef]

Wicked weather here in Whistler.Anyways, I recently got back into sps and bought a bunch of frags. They all started off beautiful but have lost the intense color. I dialed my illumina down to 40%. My alk is at 9, ca is 500. No detectable phosphates or nitrates. dosing a splash of mb7 everynight and started 5 drops of amino acid . reef is a 93g cube. 250 ml of biopellets. Thoughts? cheers