| 摘要 |
A filtration grid cover pre-impregnated with a filtering media such as diatomaceous earth is provided. The cover may have a pouch configuration sized and configured to receive a filtration grid of a diatomaceous earth filtration system. The entry aperture of the cover may be positioned at a top edge, side edge or bottom of the cover. The filtering media may be pre-impregnated on an inner surface or an outer surface of the cover. Various means of enclosing the filtration grid in the cover is disclosed or are disclosed such as with buttons, hooks and loops, adhesives, etc.
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