Fluval Peat Granules provide an all-natural way to soften aquarium water and achieve the pH levels required for breeding and rearing certain tropical fish. Peat contains humic acid, tanning agents, and trace elements that are essential for various life processes. Highly concentrated for maximum effectiveness, this product is recommended for fish that prefer soft, acidic water.Fluval Peat Granules+ chemical filter media+ all-natural way to soften aquarium water and achieve the pH levels required for breeding and rearing certain tropical fish+ contains humic acid, tanning agents, and trace elements that are essential for various life processes+ highly concentrated for maximum effectiveness+ only for freshwater suitable