Pond Force™ Barley Straw Extract Natural Water Clarifier Size:16 Ounces Winkler dissolved oxygen test will

Winkler dissolved oxygen test will give false

Other than mass production

Designed for external use with saltwater or freshwater aquariums

Professional research-grade carbon removes toxins and pollutants

weighing 10% of the equivalent volume of lava rock

Pond Force™ Barley Straw Extract Natural Water Clarifier Size:16 Ounces Winkler dissolved oxygen test willPond Force Barley Straw Extract is a naturally derived water clarifier derived from barley straw. This liquid extract harnesses the clarifying power of barley straw while eliminating the unsightly appearance and eventual decay of barley straw. Each ounce treats up to 500 gallons.