--- product_id: 143685812 title: "Pools - Shock Chlorine Granules 5kg – Stabilised, Fast-Dissolving Hot Tub Chemicals & Swimming Pool Treatment – Kills Bacteria, Rapid-Action Water Sanitiser for Pools, Spas & Jacuzzis" brand: "desjoyaux" price: "$286.22" currency: USD in_stock: true reviews_count: 8 category: "Desjoyaux" url: https://www.desertcart.us/products/143685812-pools-shock-chlorine-granules-5kg-stabilised-fast-dissolving-hot-tub store_origin: US region: United States of America --- # 98% active chlorine for rapid shock fast-dissolving granules for quick water clarity stabilised formula limits UV chlorine loss Pools - Shock Chlorine Granules 5kg – Stabilised, Fast-Dissolving Hot Tub Chemicals & Swimming Pool Treatment – Kills Bacteria, Rapid-Action Water Sanitiser for Pools, Spas & Jacuzzis **Brand:** desjoyaux **Price:** $286.22 **Availability:** ✅ In Stock ## Summary > 💦 Shock your pool back to life with Desjoyaux’s rapid-action chlorine granules! ## Quick Answers - **What is this?** Pools - Shock Chlorine Granules 5kg – Stabilised, Fast-Dissolving Hot Tub Chemicals & Swimming Pool Treatment – Kills Bacteria, Rapid-Action Water Sanitiser for Pools, Spas & Jacuzzis by desjoyaux - **How much does it cost?** $286.22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/143685812-pools-shock-chlorine-granules-5kg-stabilised-fast-dissolving-hot-tub) ## Best For - desjoyaux enthusiasts ## Why This Product - Trusted desjoyaux brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **UV-Stabilised Formula:** Keeps chlorine potent longer by resisting sun-driven evaporation. - • **Versatile Pool & Spa Use:** Perfectly engineered for all pool types, hot tubs, and jacuzzis. - • **Lightning-Fast Dissolution:** Granules dissolve swiftly, delivering instant pool clarity and freshness. - • **Crystal Clear Water, Every Time:** Say goodbye to green water and hello to sparkling, swim-ready perfection. - • **Power-Packed 98% Active Chlorine:** Unleash rapid algae annihilation with ultra-concentrated granules. ## Overview Desjoyaux Pools Shock Chlorine Granules (5kg) deliver a powerful 98% active chlorine concentration in a fast-dissolving, stabilised granular form. Designed for rapid algae elimination and water sanitisation, this premium treatment is ideal for pools, hot tubs, and spas, ensuring crystal-clear, bacteria-free water with minimal UV degradation. ## Description Great prices on your favourite Gardening brands, and free delivery on eligible orders. Review: Effective! - We have a 10ft Bestway max steel pro pool. A little visitor recently asked why the pool was green. Good question. Wed been using one of those little floating chlorine dispensers with the tablets, but after a little tea search, it appeared this stuff was effective in dealing with the algae. And it is! Annoyingly, I didn’t take before and after pictures, but I measured out 60g (a tiny fraction of the amount in the box, making the >£50 price decent value) mixed it in a measuring jug and fired it into the pool next to the inlet pipe. I did that in the evening and by the next morning the pool was clear. I was both surprised and delighted. So we’ll be using this once a week from here on in. Note - we also bought a pool vacuum (to address the detritus on the bottom) but haven’t used that yet. Review: Quite amazing - I have a 4000L pool and over the last two weeks struggled with greenish water. I had put more chlorine tablets, added liquid algaecide and vacuumed a few times, but achieved little and the water remained cloudy and green. I diluted 80 grs of these granules in a jar and poured it by the outlet. Within SECONDS the areas next to the inlet and outlet had turned clear ! After 3 hours the whole pool is a nice clear blue colour. Not a trace of greenish stuff, I don't even need to vacuum the floor and walls. The water looks like it did the very first day. Brilliant stuff which will last for ages. ## Features - Causes serious eye irritation. - Contact with acids liberates toxic gas. - Harmful if swallowed. - May cause respiratory irritation. - Use biocides safely. Always read the label and product information before use. - Very toxic to aquatic life with long lasting effects. - Very toxic to aquatic life. - Chlorine Shock Granules - To recover green water, with the presence of algae, it is advisable to carry out a shock chlorination of your water. Our shock chlorine granules will assist you in bringing your water back to being crystal clear with its quick dissolving treatment process. - Hight Quality Treatment - Our premium grade, high concentration chlorine means that white lines aren't left in your swimming pool or hot tub. The shock chlorine eliminates green algae quickly to provide clear and disinfected water. - Fast Disolving - Our granulated chlorine is designed to dissolve much quicker than tablets, meaning chlorine is distributed within the pool water volume, providing a shock treatment. This chlorine shock treatment is also effective for raising chlorine levels quickly if the level is low. - All Pool Types - Use this chlorine shock for hot tubs and pools. This highly dosed granular shock optimally disinfects your pool & hot tub water to make it suitable for swimming and relaxing. The granules are stabilised which limits the evaporation of active chlorine caused by UV rays. - Powerful 98% Active Chlorine Shock Granules - Eliminate green water and algae fast with highly concentrated chlorine granules. This 5kg disinfectant contains 98% active ingredient for powerful shock treatment—ideal for pool openings, green water recovery, or fresh fills. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07SVMNDGG | | Benefits | Granular Formula for Easy Use, Highly Concentrated, Kills Bacteria, Rapid Action, Stabilised | | Best Sellers Rank | 42,065 in Garden ( See Top 100 in Garden ) 186 in Chlorine | | Brand | Desjoyaux | | Brand Name | Desjoyaux | | Country Of Origin | France | | Customer Reviews | 4.4 out of 5 stars 325 Reviews | | Item Form | Granular | | Item Weight | 5 Kilograms | | Item form | Granular | | Item weight | 5 Kilograms | | Manufacturer | Desjoyaux Pools | | Number of items | 1 | | Product benefits | Granular Formula for Easy Use, Highly Concentrated, Kills Bacteria, Rapid Action, Stabilised | | Unit Count | 5000 Grams | | Unit count | 5000 Grams | ## Product Details - **Brand:** Desjoyaux - **Item form:** Granular - **Item weight:** 5 Kilograms - **Number of items:** 1 - **Product benefits:** Granular Formula for Easy Use, Highly Concentrated, Kills Bacteria, Rapid Action, Stabilised ## Images ![Pools - Shock Chlorine Granules 5kg – Stabilised, Fast-Dissolving Hot Tub Chemicals & Swimming Pool Treatment – Kills Bacteria, Rapid-Action Water Sanitiser for Pools, Spas & Jacuzzis - Image 1](https://m.media-amazon.com/images/I/51Oyl4+YOrL.jpg) ## Questions & Answers **Q: The instructions on the container are only in French. How much do I need to use to shock a 6,473 litre above ground pool?** A: The label on the front of the tub peels off open it up and its in english . I have a hot tub is that the same as yours **Q: what size tablets are in these tubs please?** A: They are granules not tablets, you just sprinkle them in. **Q: Hi, I have a 3mx2mx1m pool that has a nasty algae problem, 'tis rather green and uninviting, how much do I use to Shock it into deliciousness again?** A: Dear Ryddie On the back of the container, you will find a multi-page instruction booklet with the dosing instruction. This would depend on current levels within the pool, please feel free to call us on 01483 608401 otherwise start with 2 cups full and then test the chlorine levels within the pool after 20 minutes. Your should see the green algae start to turn white and potentially the water turn cloudy from dead algae. Regards Desjoyaux Pools. **Q: Is this product calcium hypochlorite** A: Good moring, is a chlorine shock treatment containing sodium dihydrate. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Effective! *by G***N on 30 July 2021* We have a 10ft Bestway max steel pro pool. A little visitor recently asked why the pool was green. Good question. Wed been using one of those little floating chlorine dispensers with the tablets, but after a little tea search, it appeared this stuff was effective in dealing with the algae. And it is! Annoyingly, I didn’t take before and after pictures, but I measured out 60g (a tiny fraction of the amount in the box, making the >£50 price decent value) mixed it in a measuring jug and fired it into the pool next to the inlet pipe. I did that in the evening and by the next morning the pool was clear. I was both surprised and delighted. So we’ll be using this once a week from here on in. Note - we also bought a pool vacuum (to address the detritus on the bottom) but haven’t used that yet. ### ⭐⭐⭐⭐⭐ Quite amazing *by P***T on 14 June 2022* I have a 4000L pool and over the last two weeks struggled with greenish water. I had put more chlorine tablets, added liquid algaecide and vacuumed a few times, but achieved little and the water remained cloudy and green. I diluted 80 grs of these granules in a jar and poured it by the outlet. Within SECONDS the areas next to the inlet and outlet had turned clear ! After 3 hours the whole pool is a nice clear blue colour. Not a trace of greenish stuff, I don't even need to vacuum the floor and walls. The water looks like it did the very first day. Brilliant stuff which will last for ages. ### ⭐⭐⭐⭐ Great product but no instructions *by A***R on 17 July 2025* I would have given it a 5 star but there are not dosage instructions. Or to be fair, there are very unclear dosage instructions in French. ## Frequently Bought Together - Desjoyaux Pools - Shock Chlorine Granules 5kg – Stabilised, Fast-Dissolving Hot Tub Chemicals & Swimming Pool Treatment – Kills Bacteria, Rapid-Action Water Sanitiser for Pools, Spas & Jacuzzis - Desjoyaux Pools - Premium Grade Algaecide 5L – Long-Lasting Algae Prevention & Treatment for Swimming Pools, Hot Tubs & Spas – Powerful Pool Chemical for Clear Water, Prevents Green Algae Growth --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/143685812-pools-shock-chlorine-granules-5kg-stabilised-fast-dissolving-hot-tub](https://www.desertcart.us/products/143685812-pools-shock-chlorine-granules-5kg-stabilised-fast-dissolving-hot-tub) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-16*