im thinking you forgot the "no" in front of reason theo? it won't cause any odd stress on the pump(s) to make the turn from intake side to return side?
~slight edit with new question for a HOB
refugium is it possible to convert one of those "double" hob
filters (like the emporor 400 minus bio-wheels) into an effective one or is it better to have the one large space like an AQ110? or slight re-edit 2 HOB
filters converted vs 1 is that a waste of time or efficient?