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MCA: I do not use a sieve prior to my Nexus/EAzy, but I do use a vortex settlement chamber. I have to have a system that allows me to be gone for a week with no attention paid to the pond. Without the vortex, there would be real risk of algae glarf blocking the EAzy during the warmest periods of the year. Even when I'm not on the road or over-extended by late nights, I do not have time during the week to clean the EAzy, but I do have time to dump settlement in the vortex. I would like having sieves rather than a vortex because of their high efficiency. but my filter pit design and site limits would not accomodate it very well. Needed to have been planned that way from the beginning.
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