Laguna Bio Booster is specifically formulated to provide many benefits to the entire pond environment. A biological water treatment, Bio Booster contains millions of beneficial bacteria that boost the natural biological efficiency of ponds as well as reduce and control toxic ammonia and nitrite. Bio Booster quickly goes to work as soon as you put it in the water and provides lasting results. It also helps mature filters and filter media, which is critical for the growth of beneficial bacteria. One 16 fl oz/473 mL bottle treats 2,500 U.S. gal. (9,460 L / 2,081 Imp. gal.) of pond water.