Beckett NB16 16-Ounce Nitrifying Bacteria For Ponds

Promote a safe environment for your plants and fish with Nitrifying Bacteria. Packaged in a convenient 16-ounce bottle, the bacteria helps create clean, clear water for several weeks between applications. Promotes a safe environment for your plants and fish for new ponds or when making water changes. Natural bacteria helps improve water clarity and keep bio-filters working efficiently. Each application lasts several weeks. Made in the USA.