--- product_id: 22887003 title: "In The Swim Pool Shock - 68% Cal-Hypo Granular Sanitizer - 25 Pounds" brand: "in the swim" price: "¥79464" currency: JPY in_stock: true reviews_count: 8 url: https://www.desertcart.jp/products/22887003-in-the-swim-pool-shock-68-cal-hypo-granular-sanitizer store_origin: JP region: Japan --- # 68% Cal-Hypo fast-acting shock 65% available chlorine for crystal-clear water Powerful defense vs bacteria & algae In The Swim Pool Shock - 68% Cal-Hypo Granular Sanitizer - 25 Pounds **Brand:** in the swim **Price:** ¥79464 **Availability:** ✅ In Stock ## Summary > 🛁 Shock your pool, stun your guests—crystal clear water, zero compromises! ## Quick Answers - **What is this?** In The Swim Pool Shock - 68% Cal-Hypo Granular Sanitizer - 25 Pounds by in the swim - **How much does it cost?** ¥79464 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/22887003-in-the-swim-pool-shock-68-cal-hypo-granular-sanitizer) ## Best For - in the swim enthusiasts ## Why This Product - Trusted in the swim brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Pool Revival:** Shock your pool into pristine condition with fast-acting 68% calcium hypochlorite granules. - • **High-Potency Chlorine:** 65% available chlorine delivers powerful, long-lasting sanitization for sparkling water clarity. - • **Versatile Sanitization:** Perfect for both in-ground and above-ground pools, spas, and hot tubs—flexible and effective. - • **Safe & Simple Application:** Pre-dissolve or dilute to protect liners while ensuring even distribution and maximum efficacy. - • **Consistent Crystal Clarity:** Maintain ideal 5-10 ppm chlorine levels with easy weekly dosing—keep your pool swim-ready all season. ## Overview In The Swim Pool Shock is a 25-pound granular calcium hypochlorite sanitizer with 68% active ingredient and 65% available chlorine. Designed for both in-ground and above-ground pools, it rapidly eliminates bacteria, algae, and microorganisms. Easy to apply and dose, it ensures safe, crystal-clear water all season long while protecting pool liners when pre-dissolved. ## Description Get your pool swim-ready with the —a powerful bundle of essentials designed to kick off your season or keep your water balanced all summer long. Keep your pool crystal clear all season with slow-dissolving that deliver powerful, long-lasting sanitization and UV protection—ideal for floaters and feeders. Maintain a pristine pool with —keeping your water safe to swim in right away and gentle on your eyes and nose. features a granular formula that raises alkalinity, stabilizes pH, and ensures clear, safe water for pools, spas, and hot tubs. Cal-Hypo Pool Shock 3 Inch Chlorine Tablets Alkalinity Increaser pH Increaser pH Reducer ## Features - Fast-Acting Algae Control: Calcium Hypochlorite (Cal-Hypo) is an effective non-stabilized chlorine shock treatment, ideal for routine maintenance in your swimming pool - Versatile Use: Suitable for above ground or in-ground swimming pools, spas, and hot tubs; Pre-dissolve or dilute to avoid bleaching the liner - High Chlorine Content: 65% available chlorine, provides powerful sanitization for crystal-clear water - Easy Application: Pre-dissolve or dilute to avoid bleaching swimming pool liners; Spread granules in the deepest part of the pool; Brush if needed - Dosage: Use 1 Pound per 10,000 gallons weekly to maintain 5-10 ppm chlorine levels ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B002WKJ6IS | | Best Sellers Rank | #119 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #8 in Swimming Pool Chlorine | | Brand Name | In The Swim | | Customer Reviews | 4.6 4.6 out of 5 stars (16,228) 4.6 out of 5 stars | | Item Form | Granular | | Item Weight | 25 pounds | | Manufacturer | In The Swim Discount Pool Supplies | | Manufacturer Part Number | 25237 | | Model Number | 25237 | | Number Of Items | 1 | | Package Size Name | 25 Pound | | Product Benefits | Kills Bacteria, Maintains Clean Sanitized Water | | Unit Count | 400 Ounce | | Upc | 815100020700 | ## Product Details - **Brand:** In The Swim - **Item Form:** Granular - **Item Weight:** 25 pounds - **Product Benefits:** Kills Bacteria, Maintains Clean Sanitized Water - **UPC:** 815100020700 ## Images ![In The Swim Pool Shock - 68% Cal-Hypo Granular Sanitizer - 25 Pounds - Image 1](https://m.media-amazon.com/images/I/51htGLF-wFL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: How large are the tabs (3 inch or smaller) and how many tabs in each 50 lb bucket?** A: Granules are not tabs. They are coarse particles, about the consistency of hominy grits. There are probably several million granules in a 50 lb. bucket. I'm going to go out on a limb here and estimate that there are 50 lbs of them. What I do is fill the scoop (it comes inside the bucket) with granules, get 1 to 2 gallons of water from my pool in a 5 gal. plastic bucket and pour in the particles. I stir them around with a stirrer made of a short length of PVC pipe and break up any clumps that have formed over time. I pour the slurry into the pool at several different points. The granules are not stabilized chlorine (which most tabs are) but calcium hypochlorite (same chemical as bleach). **Q: I feel dumb, but I can't figure out how to open this bucket. I've tried jostling the red tab and turning but to no avail. Any tips?** A: I had this issue the first time as well. Examine the red lock tab to see how it locks into place by falling into those holes. You need to pull up on that. Thing is, mine had already been pulled up. So instead of concentrating my energy on that I stood up, grabbed the top of the bucket with both hands and turned it left in order to open it. Simply grabbing it from the side with one hand was not enough the first time so you'll need both hands and grab from the top. Have another person hold the red tab up at the same time and it should open easily. **Q: Does this product contain a cyanide-based UV stablizer?** A: It does not contain stabilizer. **Q: can be used for potable/drinkable water and if it falls under NSF Standard 60?** A: Haha! That's a good one! It works great for pool water. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This powerful formula not only eliminates harmful bacteria and algae *by on Reviewed in the United States May 6, 2026* In The Swim Pool Shock is a highly effective 68% calcium hypochlorite granular sanitizer designed to maintain crystal clear water in swimming pools. This powerful formula not only eliminates harmful bacteria and algae but also helps to stabilize chlorine levels, ensuring a safe and enjoyable swimming environment. Its quick-dissolving properties allow for rapid application, making it an ideal choice for pool owners looking to address water clarity issues promptly.Additionally, this pool shock product is user-friendly, requiring minimal effort for optimal results. By regularly using In The Swim Pool Shock, pool owners can significantly enhance water quality and prolong the life of their pool equipment. Its reliable performance and ease of use make it a top choice for both residential and commercial pool maintenance, providing peace of mind for those who prioritize cleanliness and safety in their swimming spaces. ### ⭐⭐⭐⭐⭐ Best I've Used *by on Reviewed in the United States June 17, 2026* This has been the best pool shock I've ever used. Has made keeping my pool clean and clear a breeze. The price is good too! ### ⭐⭐⭐⭐⭐ Quick acting shock *by on Reviewed in the United States July 4, 2026* Shock has helped the pool go from green to blue (check photos). Good product that works quickly (12 hours) ## Frequently Bought Together - In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds - In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds - Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1) --- ## 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.jp/products/22887003-in-the-swim-pool-shock-68-cal-hypo-granular-sanitizer](https://www.desertcart.jp/products/22887003-in-the-swim-pool-shock-68-cal-hypo-granular-sanitizer) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-21*