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This past weekend I spoke with Carl Forss at length about filtration. (He owns Keirin Koi and deals in the EA line of products.) His experience has been that in locations where there is substantial leaf drop into a pond, the Nexus needs a vortex in front of it to capture the largest debris. Only then can blockage be avoided in situations where the koikeeper cannot engage in daily filter maintenace routines. The prersence of substantial algae may fall in the same category.
This is important to me, because I have to have a system capable of operating without human involvement for at least 7 days at a time, even if it operates at a lesser level than is otherwise achievable. I may be able to do daily settlement discharge, or on little or no notice I may be out of town for a week. The system has to be able to function on that basis or it is not right for me/my pond, no matter how good it may be in theory.
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