Filter pad inoculant. Convenient, easy to use, flip-top squeeze bottle. A technological breakthrough because it is the first product that puts the bacteria right where you want it and it stays there Quickly attaches to and populates any filter media including foam, strapping, floss, bio balls, spring flo, ceramic media, etc. This will help to rapidly establish the necessary biological activity in your filter to stabilize your pond�s environment quickly. It will also help restore this activity to your filter when you clean or change the media in your filter. This product contents 8 ounces.