SpaPure Multi Shock Extra | Chlorine Spa Shock

• 1 x SpaPure Multi Shock Extra (2 lb resealable container, granular)

• Multi-function chlorine shock — sanitizes, shocks, and oxidizes in one product
• Kills algae — chlorine-based disinfecting action clears and prevents algae
• Oxidizes organic waste — burns off the oils and contaminants that cloud water
• Doubles as a primary sanitizer — can establish and maintain a chlorine residual on its own
• Adds sparkle — brings clarity to dull water and a fresh, soft feel
• Fast turnaround — spa can be used in as little as 15 minutes once chlorine is in range

When you broadcast the granules into circulating water, the dichlor dissolves and releases a strong dose of free available chlorine. That chlorine simultaneously destroys bacteria and algae and oxidizes the organic waste bathers leave behind, converting it into byproducts that filter out or gas off. The "extra" strength means it can both reset the water as a shock and hold a residual as a sanitizer.

Dichlor is a stabilized chlorine — it contains cyanuric acid that protects the chlorine from burning off too quickly, which is good day to day but means the cyanuric acid slowly accumulates over time. The target for routine use is a free chlorine residual of 1–3 ppm, and reentry is prohibited above 3 ppm.

Pro Tip: Always broadcast it over the water with the pump running, and brush any granules that settle to the bottom. Concentrated chlorine granules left sitting on an acrylic or vinyl surface can bleach or damage a spot — so spread them across moving water, and if any sink, use a spa brush to disperse them before they sit.

Never mix different products together in the same bottle or pail. Always add with the pump and filter running to ensure complete mixing, broadcasting the product uniformly over the surface of the water. Always apply when the spa is not in use. Adjust pH to between 7.2 and 7.6 first.

As a Primary Sanitizer

1. Add 4 teaspoons (1/2 ounce) per 500 gallons to establish a free chlorine residual of 1–3 ppm.
2. Circulate 5 to 10 minutes for complete mixing, then test for free chlorine.
3. Once the residual is 1–3 ppm, the spa may be entered. Reentry is prohibited above 3 ppm chlorine. Do not let the residual drop below 1 ppm.

As a Weekly Shock

1. Add about 2 ounces per 500 gallons with the pump and filter running.
2. Brush any undissolved granules off the bottom; never let undissolved product rest on spa surfaces.
3. Test chlorine before reentry — do not reenter until the residual is between 1 and 3 ppm.

Pro Tip: Test before you get in — every time. Because this product can push chlorine well above the safe soaking level, never reenter the spa until a test strip confirms 3 ppm or lower. A 30-second test is all it takes to avoid a too-strong, irritating soak.

• Brand: SpaPure
• Manufacturer: Haviland Consumer Products
• Part Number: SPA5210-CS20B2
• Product Type: Chlorine-based multi-function shock / disinfectant
• Form: Granular (fast-dissolving)
• Active Ingredient: Sodium dichloro-s-triazinetrione (dichlor), 50–60%
• Net Weight: 2 lb
• Functions: Sanitizes, shocks, kills algae, oxidizes waste, improves clarity
• Dosage (primary sanitizer): 4 tsp (1/2 oz) per 500 gallons for a 1–3 ppm residual
• Dosage (weekly shock): ~2 oz per 500 gallons
• Target Level: 1–3 ppm free available chlorine
• Reentry: Only when chlorine is 3 ppm or below; do not let residual drop below 1 ppm
• Ready to Use: Spa can be used in as little as 15 minutes once chlorine is in range
• System: For chlorine-method spas (not for bromine routines)
• Application Note: Apply when spa is not in use; broadcast with pump running; brush settled granules
• Shipping: Ground shipping only (ships via UPS Ground; classified as a regulated chlorine product)

SpaPure Multi Shock Extra is designed for spas run on a chlorine program — it's a chlorine product, so it's not intended for bromine routines. It can act as your primary chlorine sanitizer or as a weekly shock alongside SpaPure Chlorinating Granules.

It works as a system with your pH and alkalinity balancers (always balance the water to pH 7.2–7.6 before shocking) and SpaPure test strips to confirm your free chlorine sits in the 1–3 ppm range before reentry. One timing note: if you use an enzyme product like SpaPure EZ-Enzyme, hold off adding it until the chlorine level drops back below about 6 ppm after a heavy shock. Never mix this product with other chemicals in the same container.