Package contains: One Spa Marvel Water treatment & Conditioner, One Free Darlly (Oil Absorb) Duck Improves water quality, clarity, comfort, and odor Reduces the amount of foam in the water Requires less products to be added Spa Marvel Water Treatment/Conditioner and Free Darlly (Oil Absorb) Duck The Spa Marvel Water Treatment & Conditioner product is an enzyme based liquid formula that makes taking care of your spa easier and swimming more enjoyable. Using this product regularly (every 3 months as directed) will enhance the clarity, comfort, and odor of your spa. Adding this product will require you to use less products while using the Spa Marvel Water Treatment. Not only will this water conditioner make the water softer, but it will maintain pH and alkalinity, remove and prevent stains and scaling, and reduce the amount of foam in the water.