SPA Marvel Water Treatment & Conditioner (SP1) - 2-PACK - Bundle with a Lumintrail BagNo more scum lines. No more chemical hassles. No more hot tub rash. Gentle to skin and hair. Conditions water for sensitive skin. People with eczema and psoriasis love using Spa Marvel as this hot tub water treatment actually improves their condition.Helps to maintain pH and alkalinity. Prevents scale buildup from occurring and descales deep-seated buildup that can accumulate over time from regular use, especially in hard-water areas, resulting in stronger jets, quieter pumps, more efficient heaters, and overall greater longevity of your equipment. Eliminates foam in a few hours without the use of defoaming agents. Water so soft & odorless you won´t feel the need to shower after using your spa & hot tub. Just empty one bottle of Spa Marvel Hot Tub Water Treatment & Conditioner into your spa or hot tub water and enjoy the natural benefits for up to three months. Other uses:In koi ponds and aquariums to help maintain water quality and clarity.In fish-farming to improve the aquatic environment.In bird baths and other water features. Spa Marvel descales and prevents calcium and lime buildup in water- features, lubricates moving components and reduces surface tension to create an environment less-hospitable for mosquitoes. Water treated with Spa Marvel is safe in the event it is consumed by birds or pets.In cooling towers to remove and to help prevent scale buildup.For washing pets.For cleaning. Spa Marvel does not stain anything. Great for cleaning pet stains and more!