• Filter Ring-For 4 Inch Poseidon Reef Filters


    Filter Rings for use with 4 inch Poseidon Reef Filters.  Our filter socks (sold seperately) can be cut to length and then fitted to the Filter Ring.  The assembly will fit in most 4 inch filter sock holders.  When the filter is saturated simply remove it from the Filter Ring and replace it with a clean filter.  Soak saturated filters overnight in dilute household bleach and then run them through the washing machine.