Any acan experts?

[TheWatchmanGoby]

Hi, i bought a vivid acan mini colony a couple weeks ago and it seems to have lost its vividness but not its size.
Its tentacles are out everynight and i feed it every second or 3rd day. Hes got some fatness and puff to him too.
My light is a radion g2 and i run it all day on blues (50%) and a couple hours in the morning with some white and a little red and green in there. Light is 12 inches off tank. My tank is 24 high and right now the acan is about 5 inches off sandbed on a rock in the center of tank with low flow.(hammer in the same area is at a gentle slow motion pulse/sway)