zoas feeding

I have some reef roids I can use to feed my Zoas. Should I or even, could I?

I saw..... what I believe..... was a feeding response to certain Zoas when I turned off all flow and let oyster juice slowing trickle down (fallout). I DID NOT squirt juice on the Zoas directly but created a cloud of juice a few inches above the Zoas colony and let the juice trickle down...