Are your chickens drinking nasty water? Preserve the taste and quality of your flock's water with all natural Poultry Water Protector from Manna Pro. A unique blend of enzymes stops film, residue and other contaminants from building up in plastic, galvanized and even heated water containers. Poultry Water Protector maintains a cleaner, healthier water supply one cap full at a time. 16 oz. bottle.