I have them in lagoon mode right now... I want to try that for a bit, then try reef-crest. I've no preference right now.
Yes, they are synced... man that process could not be easier... you simply hold some buttons for 3seconds... one button combo sets the controller to MASTER, another button combo sets it to slave... set one to master and the rest to slave mode... and you are done..... Ignore the slave controllers now, they do whatever your master does... simple, simple, simple.. Speed, mode, etc all synced from the master...
You set the slaves to one of two modes, either matched or opposite... in matched they do the same as the master, in opposite they do the opposite... To create a wave, i set the mode to PULSE and the slave to "opposite" mode.. one pump pushes for 1sec or so, then the other pushes back... There is a 1 page manual, and it's all you need... so completely simple it should be illegal.
PS: Kelso1980 - Acans are the easiest corals to keep. Often sold as beginner corals. If you can keep your water wet, you can keep acans...