The parameters that you listed aren't bad. Whats your nitrate and phosphate look like. It could just be transplant shock. It's only been 3-4 days. I know it can be stressful buying corals for a hundred bucks or more a piece and not having them pop in the first day or so but, sometimes they just take time to settle in. Think how you would feel if someone ripped you out of your home, plopped you down in Bejing, shined a spotlight on your head and said dance sucker. Some corals can take 2 weeks or more to get happy I wouldn't stress. I have had some acans take up to a month to get happy.
How much light are they getting? Usually acans(most corals for that matter) do best after transplant if put in a kind of shaded/low light area for the first couple of weeks. Once they start looking good you can start moving them into the light. A lot of people report good results with Acans when they put them in pretty low light conditions(50-75 PAR). Higher light can cause acans to change color(usually to red/orange) or bleach