Oxo Brite Powder. 

ECOS Oxobrite Multi Purpose Stain Remover is extraordinarily effective and concentrated with mineral based power. Each scoop gives you extra-strength cleaning that's safer for your family with no phosphates, no chlorine and no bleach. This product has hundreds of uses including carpet stains and odors, upholstery, grout, calcium buildup, decks, outdoor furniture, bathroom surfaces and pet messes. This oxygen cleaner comes in a 3.6 lb. tub. See the facts label for warnings and allergens.