Man I didn't get any updates there's been like 5 pages!
Your acans look happy. Mysis and other meaty food is the fastest way to grow them. If their color starts fading they may need a little more nutrients in the water -- it's what was happening to my friend with the same setup as you.
I just fed my acans actually, funny the first thing I see is you feeding yours
I try to teach my kids that they are animals. The best way to show them is feeding Mysis and LRS so they see for themselves these critters eat meat. My little one loves to spot feed them.
One day one of our Caulastrea heads had a full snail it was trying to swallow and I called for them to come look. We were taking bets on if he could get it down. Lucky for the snail he had it by the backside and finally gave up. I saw one once though take a small hermit all in and spit the shell out, LOL.