My thoughts on the matter are to use 2 pumps, or feed with a T off the drain from the tank.
Basically you'd be building a recirculating venturi skimmer. Flowthrough handled by one small pump (probably under 200gph) level controled by a gate valve, using the original input/outlets from the becket. Then you have to add a new inlet/outlet in the reactor chamber, for the recirculating needlewheel/venturi.
That's the easiest way I see to do it - Maybe someone else has a better suggestion.
Andy
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