Refresh your spa or pool water with this high-strength calcium hypochlorite shock. With 70% available chlorine, it destroys organic contaminants, eliminates algae, and restores water clarity fast—ideal for both hot tubs and swimming pools.
70% available chlorine rapidly breaks down oils, sweat, cosmetics, and other unwanted contaminants.
Kills and prevents green, black, and yellow algae growth.
Acts as a clarifier, improving water transparency and sparkle.
Suitable for both saltwater and freshwater systems, in-ground or above-ground pools, and all spa types.
pH should be 7.2–7.6 and alkalinity between 80–120 ppm. This ensures effective chlorine performance and prevents irritation.
Add 20g per 1,000L of water (or 75g per 10,000L) weekly for maintenance. Increase dose after heavy usage or visible algae.
Add directly to the water with pump running, or pre-dissolve in a bucket for even distribution.
Allow 15 minutes of circulation before use. The fast-dissolving formula quickly sanitizes without harsh residue—leaving water clean, fresh, and ready to enjoy.
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This Item  Next Gen Hot TubsShock – Calcium Hypochlorite Pool & Hot Tub Treatment – 2kg (4.4 lbs) – 70% Available Chlorine – Powerful Algae Eliminator & Water Clarifier | Recommendations  |  |  |  |  | |
| Price | -13%$39.95 List: $45.99 | $59.94 | $124.99 | $39.95 | $37.97 | -7%$62.99 List: $67.38 |
| Delivery | Get it Jun 19 - 25 | Get it Jun 18 - 20 | Get it Jun 19 - 23 | Get it Jun 19 - 23 | Get it Jun 18 - 20 | Get it by Tuesday, Jun 17 |
| Customer ratings | ||||||
| Sold by | Hot tub superstore | Splash and Play | Discount Pool Supply | Discount Pool Supply | Splash and Play | Canada Hot Tub Parts |
| form | Powder | Granular | Granular | Granular | Granular | Granular |
