Acropora is a beautiful sps. On the downside, it is harder to care for than other sps. You need very precise water, which means you will need either a calcium reactor or a doser. You need great water flow which is where powerhead and wave makers come in. Don't go for a cheap 20 dollar powerhead, find a good one with a good gph. You will definitely need a skimmer. Since I have a 20 gallon, I have a hydor nano skimmer. Bigger tanks require bigger skimmers, which will need a sump. Last but not least you need t5 or 3 watt LEDs or more. They have to have great lighting. Acropora is a great coral and this is what you need to have them.