(2) Danner Coarse Foam/Poly Pad Replacement Filters for Pondmaster 190 - 12195 Specifically Designed combo pack for use with Pondmaster 190 Contains one foam filter &amp; one set of coarse polyester media Pondmaster has an extensive line of replacement media carefully designed to maintain the effectiveness of the original filter Coarse foam &amp; polyester offer biological filtration and mechanical filtration Filtration helps support plant and fish life