A rough overview of the ballast system setup in my 2001 Moomba MobiusV. This is late at night and after a few (ok several) drinks so bear with me. I run two WakeMakers 910lb bags in the rear compartments both fed and drained by Tsunami 1200 pumps, and a gravity games 1180 bag in the basement compartment fed by a Rule 1100 pump and drained by a Tsunami 1200. All 1" lines with vented loops on the fills and oneway valves on the vents.

My rear bags vent and drain on the opposite side of the boat to prevent any draining while listed. However now we run a homemade 'SuckGate' shaper and fill both rears (non surf side about 5075%) while surfing so we don't list to one side near as much.