Hi there, when would I use these modes? I now have a larger tank (65 gal) and two MP10s on the opposite side walls. I assume Sync allows me to have those modes listed in the manual, however, I don't think there is mention of antisync. Antisync seems to provide more turbulence in my tank (simply guessing if does the exact opposite of what the parent is doing. Any thoughts and shared experience is helpful. Also, I'm assuming echosmart back would be if I placed a powerhead on the back of the tank. Thanks in advance.