Midea Grit is a seashell-based gravel ideal for birds and other confined creatures needing a natural substrate to nibble, scratch and paw in. Polly will love the variety. Midea Grit provides calcium, magnesium and other minerals that are essential for birds and other animals. Midea grit is made by wave action from shells and stone and contains no artificial dyes or paints to flake off. Does not contain toxic metal impurities, petroleum residues or pesticides Also suitable for freshwater and marine aquaria as a gravel and pH stabilizer. Size 1-6mm, 1kg bag What's in the box 1 x 1kg Midea Grit