Color: other Size: 16 oz Contains one (1) API AMMO-LOCK Freshwater and Saltwater Aquarium Ammonia Detoxifier 16-Ounce Bottle Detoxifies ammonia in aquarium water and tap water Works instantly to make aquarium water safe for fish Reduction in ammonia levels measurable on any API Test Kits Dose freshwater and saltwater every two days until ammonia is not detected.