ecoone One Shock Granular Chlorine Hot Tub Shock — 2 lb, 55% Chlorine Fast-Dissolving Granules

One Shock Granular by EcoOne is a self-dissolving chlorine shock and cleaner that simplifies hot tub sanitation with a 55% chlorine active formula.

Designed for both weekly shock treatments and routine sanitizing, EcoOne One Shock Granular combines a concentrated active ingredient—sodium dichloro-triazinetrione dihydrate (55% available chlorine)—into an easy-to-use, fast-dissolving granule. Packaged in a 2 lb container, it works in spas and hot tubs to help maintain clear water while keeping dosing straightforward for homeowners and service pros alike.

How do I use One Shock Granular to shock my hot tub?

Shock treatment is simple: add measured granules directly to circulating spa water. For a weekly shock, the recommended dose is 1 ounce per 500 gallons to raise available chlorine into a short-lived sanitation range; smaller daily maintenance doses are also provided.

• Add 1 oz per 500 gallons for weekly shock (target 1–2 ppm available chlorine).
• For daily sanitation, add 1/4 to 1/8 oz per 500 gallons as needed.
• Ensure the pump is running and allow granules to fully dissolve before soaking.
• Store container sealed and dry between uses to preserve potency.

Is this product safe for sensitive skin and hair?

EcoOne formulates One Shock Granular to include only the essential active components for effective spa sanitation, minimizing unnecessary additives. While it’s intended to be gentler than some harsher shock compounds, users should always follow dosing guidance and rinse off after spa use if they have known sensitivities.

• Formulated to reduce unnecessary extra ingredients.
• Avoid direct contact with undiluted granules; always dissolve first.
• Rinse after bathing if you have sensitive skin or hair concerns.
• Test water before re-entering to confirm chlorine levels are safe.

Will One Shock Granular affect my hot tub balance or equipment?

The active ingredient—sodium dichloro-triazinetrione dihydrate—dissolves cleanly and is compatible with common spa materials and filtration systems when used as directed. Routine water testing and balancing still matter: shock treatments address sanitizer levels, but pH, alkalinity, and calcium hardness should be monitored separately.

• Dissolves without heavy residues when used at recommended rates.
• Compatible with most filters, covers, and spa surfaces under normal use.
• Complement with pH and alkalinity adjustments for optimal performance.
• Follow manufacturer care instructions for equipment longevity.

How concentrated is this shock and how much comes in the package?

Each 2 lb container of One Shock Granular contains a chlorine-releasing compound with 55% available chlorine by weight. This concentration delivers effective oxidation and sanitation power in a compact package suited for regular hot tub maintenance.

• Active ingredient: sodium dichloro-triazinetrione dihydrate — 55% available chlorine.
• Pack size: 2 pounds, convenient for home spa use.
• High concentration means smaller doses achieve target chlorine levels.
• Keep container sealed and stored in a cool, dry place to retain strength.

Who is this for? One Shock Granular by EcoOne is tailored to hot tub owners, property managers, and pool technicians who want a straightforward, effective chlorine shock that dissolves easily and integrates with routine spa care. It suits people maintaining residential spas who prefer measured dosing, as well as busy users who want a low-fuss solution for weekly oxidation and daily sanitation support. Always follow label directions and local safety guidance when handling and applying chemical treatments.