Carib Sea Instant Aquarium Multi Colored Peace River Sand (40 lbs) [Set of 2] Water packed with living, water-purifying bacteria, state of the art clarifier and complete water conditioner. Detoxifies metals, eliminates ammonia, neutralizes chlorine and chloramines, and provides a protective slime coat for fish. Also reduces nitrates and nitrites. Simply add tap water and instant aquarium automatically begins the cycling process.