Fluval Peat Granules is the 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. Fluval Peat Granules will enhance coloration and behavior of some species of fish. For freshwater use only. Shipping weight: 1 1/4 lbs.