If you were really wanting to use a rotating spraybar (ie, if the benefits are enough to justify this..) could you not have the water arrive first into a large mechanical media section of your sump, install an extra pump (yes, more power draw .... this is where the justification question comes into it
) to pump from there up to your rotating spraybar to dump it all over your biomedia, and then back up to the tank? So it'd be:
Tank -> Mechanical Media to catch all the crud -> pump -> spray bar over bio media -> back into sump and through whatever else you want -> pump -> tank.
I personally dont think it'd be worth it.. but I dont see why it wouldnt work *shrugs*

Tank -> Mechanical Media to catch all the crud -> pump -> spray bar over bio media -> back into sump and through whatever else you want -> pump -> tank.
I personally dont think it'd be worth it.. but I dont see why it wouldnt work *shrugs*