{"product_id":"slow-chlorine-tablets-20g-1kg","title":"Slow Chlorine Tablets 20 g – 1 kg","description":"\u003ch1\u003e\n\u003cspan\u003eSlow Chlorine Tablets 20 g – 1 kg\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eEUR-O-TABS 20 g slow chlorine tablets\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, supplied in a 1 kg pack, are designed for the regular disinfection of water in smaller private swimming pools. Their slow-dissolving formula helps maintain an appropriate chlorine concentration while preventing algae growth.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 20 g tablet format is distinct from larger 200 g chlorine tablets intended for different pool volumes. Choosing the correct tablet size and following its specific dosing instructions makes routine water treatment easier to manage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWhat are 20 g slow chlorine tablets used for?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eSlow chlorine is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eroutine water disinfection treatment\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with bactericidal and algicidal action. Unlike shock chlorine, which is intended for specific corrective treatments, slow chlorine provides gradual chlorine release for ongoing pool maintenance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEUR-O-TABS tablets contain symclosene, also known as trichloroisocyanuric acid. This active substance releases chlorine progressively when in contact with pool water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAccording to the product label, the tablets are compatible with all pool filtration systems, including cartridge filters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eHow many 20 g chlorine tablets should I use?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhat is the recommended dosage for a small swimming pool?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe EUR-O-TABS label specifies \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1 tablet of 20 g for a swimming pool holding less than 10 m³ of water\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, placed in the skimmer or a floating dispenser.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCheck and maintain the following water parameters:\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eParameter\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eLabel instruction\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWater pH\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7.0–7.4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFree chlorine\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.5–3 mg\/L\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eReference dosage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 × 20 g tablet for a pool below 10 m³\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eDo not automatically scale this dosage for larger pools, very small water volumes or hot tubs. Those applications require appropriate, specifically validated instructions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen to add another tablet depends on your pool's treatment needs. Follow the relevant recommendations in the iopool app and check your water regularly, always within the manufacturer's instructions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eHow do I use slow chlorine tablets?\u003c\/span\u003e\u003c\/h2\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCheck the water pH\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and adjust it to between 7.0 and 7.4 if necessary.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eConfirm the correct dosage.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The label specifies one 20 g tablet for a swimming pool below 10 m³.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePlace the tablet in the skimmer or a floating dispenser.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Never allow it to rest directly against the pool liner.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdjust the daily filtration time.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The label recommends a number of filtration hours equal to half the water temperature in °C. For example, water at 26 °C requires 13 hours of filtration under this instruction.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCheck the free chlorine level\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and continue treatment based on the measured water condition and relevant app recommendations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003eRemove the floating dispenser during swimming. For additional guidance, read \u003c\/span\u003e\u003ca href=\"https:\/\/iupool.com\/blogs\/pool-advices\/where-to-apply-chlorine-tablets-in-your-pool\"\u003e\u003cspan\u003ewhere to place chlorine tablets in your pool\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWhy choose 20 g tablets instead of 200 g tablets?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe difference is the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eweight of each individual tablet\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, not simply the pack size. Each EUR-O-TABS tablet in this product weighs 20 g, whereas larger chlorine tablets weigh 200 g.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 20 g format has a label dosage intended for smaller swimming pools. If you maintain a larger pool, explore our \u003c\/span\u003e\u003ca href=\"https:\/\/iupool.com\/collections\/chemicals\/products\/slow-chlorine-copy\"\u003e\u003cspan\u003e200 g slow chlorine tablets in a 1 kg pack\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlways check the specific label when changing tablet sizes. Different formats must not be treated as interchangeable doses.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eProduct specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCommercial name\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEUR-O-TABS\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTreatment type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSlow-release chlorine\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eForm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSlow-dissolving tablets\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIndividual tablet weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTotal pack weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eActive substance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSymclosene (trichloroisocyanuric acid)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eActive substance content\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e98% according to Belgian registration\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBelgian registration number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBE-REG-01647\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRegistration holder\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eB-Care Chemicals\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIntended action\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBactericidal and algicidal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eSafety and storage instructions\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDanger — Handle this biocidal product with care.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe product may intensify fire, is harmful if swallowed, causes serious eye irritation and may irritate the respiratory tract. It is also very toxic to aquatic life with long-lasting effects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKeep the tablets in their closed original packaging, away from children, moisture, sunlight and heat. The label indicates a storage temperature of 5–25 °C. Wear suitable protective gloves and eye protection when handling the product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNever mix these tablets with other chemicals\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, particularly acids. Do not combine them with bromine-based or PHMB treatments, and do not place different treatment products in the skimmer at the same time. Never pour water onto the concentrated product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKeep tablets away from direct contact with the pool liner. Dispose of unused chemicals and their packaging in accordance with local requirements. Do not release the product into drains or natural waterways.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlways read the full product label and safety information before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eManage your pool treatment with iopool\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe iopool app helps you follow your pool's water condition and provides treatment recommendations, including guidance on when another dose may be required for a supported setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith \u003c\/span\u003e\u003ca href=\"https:\/\/iupool.com\/products\/eco-start\"\u003e\u003cspan\u003eEcO Start, the iopool smart water analyser\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e, you can follow pH, oxidation-reduction potential (ORP) and water temperature. ORP is not a direct reading of free chlorine, which should be checked separately using a suitable water test.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAs symclosene is a stabilised organic chlorine compound, monitoring cyanuric acid is also relevant. Learn more in our guide to \u003c\/span\u003e\u003ca href=\"https:\/\/iupool.com\/blogs\/pool-advices\/cyanuric-acid-pool\"\u003e\u003cspan\u003epool stabiliser and cyanuric acid\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eApp guidance supports regular maintenance but does not replace the manufacturer's safety instructions or labelled dosage.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently asked questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eCan I use these chlorine tablets in a hot tub or spa?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe 20 g format is also marketed for spas by some suppliers. However, the supplied label provides a dosage for swimming pools below 10 m³, not a spa-specific treatment protocol. Confirm the applicable authorisation and appropriate spa dosage before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan I put these tablets directly into the pool?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. The label instructs users to place the tablets in the skimmer or a floating dispenser. Do not allow direct contact with the pool liner.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHow often should I replace a chlorine tablet?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eReplacement depends on water conditions, testing results and the recommendations available in the iopool app. Always observe the product label rather than applying a fixed schedule to every pool.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAre these tablets suitable for cartridge filters?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The product label states that the tablets are compatible with pool filtration systems, including cartridge filters, provided the application instructions are followed.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIs slow chlorine the same as shock chlorine?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. Slow chlorine is intended for ongoing disinfection, while shock chlorine is used for specific corrective treatments. They have different purposes and dosing instructions.\u003c\/span\u003e\u003c\/p\u003e","brand":"iopool","offers":[{"title":"Default Title","offer_id":61978710540618,"sku":"CHL-020-1K-B-V1","price":15.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0100\/9998\/2432\/files\/IoPool_1KG_ChlorineSlow_CarreBCase_Pastille20g_65ec4a78-c77a-4c85-824e-faa666b13062.jpg?v=1761308244","url":"https:\/\/iupool.com\/products\/slow-chlorine-tablets-20g-1kg","provider":"iopool","version":"1.0","type":"link"}