Yeah, just feed it. I feed mine every other day with a mixture of
PE Mysis, Cyclopeeze, reef plus (amino & vitamin sup.), marine snow & DT's Oyster eggs. I mix all of that together in a cup of saltwater, Then I turn off all powerheads and feed with a Kent super squirt.
It also depends on where your acan was taken from, I've heard Indo-acans will reproduce more. My Acans usually produce 5 polyps a month.
BTW- I do this at night, that way it gives the corals a chance to feed without fish stealing it from them.