Help with coral ID

[bues0022]

I got this at the spring meeting frag give-away - but I really don’t know what it is. It’s never really grown much, but it hasn’t receeded ever either, so I’m not messing up too much. It’s pinkish with yellow/green tips, and usually has pretty good polyp extension, and when feeding its polyps almost look like a milli. Is this a plating acro of sorts? (The frag growth pattern kind of look like it). I am just trying to know more specifically what it might be so I can help get some better (any) growth out of it. 

[GraffitiSpotCorals]

Looks like it could be a mille or similar acro. Who did you get it from?

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[bues0022]

It was one of the freebies. It was called: acro. I actually really like the little thing, and want it to grow into a big thing so I can pay it forward and give some back - but it’s stubbornly not growing. I’m thinking it may be because I’m not giving it something it needs (light flow) because I have no idea what it actually is ?

[Origami]

Polyp/calyce shape and rounded tip makes me think Acropora millepora, too.