--- product_id: 12453145 title: "DryTec 1-1901 Calcium Hypochlorite Pool Shock, 1-Pound" brand: "drytec" price: "₩45737" currency: KRW in_stock: true reviews_count: 8 category: "Dry Tec" url: https://www.desertcart.kr/products/12453145-drytec-1-1901-calcium-hypochlorite-pool-shock-1-pound store_origin: KR region: South Korea --- # 5-10 ppm available chlorine per 10,000 gal 68% Calcium Hypochlorite purity Optimal pH 7.2-7.6 & alkalinity 60-120 DryTec 1-1901 Calcium Hypochlorite Pool Shock, 1-Pound **Brand:** drytec **Price:** ₩45737 **Availability:** ✅ In Stock ## Summary > 💦 Shock your pool into perfection — because clear water is the new status symbol! ## Quick Answers - **What is this?** DryTec 1-1901 Calcium Hypochlorite Pool Shock, 1-Pound by drytec - **How much does it cost?** ₩45737 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/12453145-drytec-1-1901-calcium-hypochlorite-pool-shock-1-pound) ## Best For - drytec enthusiasts ## Why This Product - Trusted drytec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Application:** Granular formula disperses evenly when broadcasted, preventing residue buildup. - • **Trusted & Versatile:** Top-rated pool shock (#27 in Swimming Pool Chlorine) with 4.6-star reviews, also ideal for emergency water purification. - • **Powerful Purification:** High 68% calcium hypochlorite ensures rapid and effective pool sanitation. - • **Balanced Water Chemistry:** Maintains ideal pH (7.2-7.6) and alkalinity (60-120) for swimmer comfort and equipment longevity. - • **Precision Chlorine Control:** Delivers 5-10 ppm available chlorine per 10,000 gallons for crystal-clear water. ## Overview DryTec 1-1901 Calcium Hypochlorite Pool Shock is a premium granular sanitizer with 68% active ingredient, designed to maintain crystal-clear, balanced pool water by delivering 5-10 ppm chlorine per 10,000 gallons. It optimizes pH and alkalinity levels for swimmer comfort and equipment protection, making it a top choice for routine chlorination and shock treatments. Highly rated and trusted, it also serves as a reliable emergency water purifier. ## Description Use entire contents of bag when opened. If any granules settle to the bottom of the pool use brush to disperse. Add the recommended dosage of this product during evening hours while the filter pump is running. When adding this product to your pool, broadcast the product evenly over a wide area in the deepest part of the pool. If any granules settle to the bottom of the pool use brush to disperse. Water Balance: For best product performance, swimmer comfort, and crystal clear water: Maintain pH in the range of 7.2 to 7.6. Maintain total alkalinity in the range of 60 to 120. Maintain calcium hardness above 200 ppm. Use a reliable test kit that measures all these ranges. Use Pool Care Products to make adjustments. Follow label directions for each product. Do not enter pool until the free available chlorine residual is 1- 4 ppm for each of the below noted water treatment applications. OPENING YOUR POOL: For best results, see the Water Balance section above before treatment. Always adjust and maintain pH in the 7.2 to 7.6 range. Follow "SHOCK TREATMENT / SUPERCHLORINATION" directions on this package. Allow 30 minutes for product to disperse. Test free available chlorine residual with a pool test kit. Repeat treatment as needed. ROUTINE CHLORINATION: For best results, see Water Balance section above before treatment. Throughout the pool season, adjust and maintain pH at 7.2-7.6. Check available chlorine with a suitable test kit.SHOCK TREATMENT / SUPERCHLORINATION: Every 7 days, or as necessary to prevent pool problems, shock treat /superchlorinate the pool by adding one bag of this product per 10,000 gallons of water to provide 5 to 10 ppm available chlorine. Additional shock treatments may be required to correct problems which are caused by visible algae, high bathing loads, heavy wind and rainstorms. Additional shock treatments may also be required to correct problems such as unpleasant odors and eye irritation. Check the available chlorine with a suitable test kit. ## Features - One bag of this product per 10,000 gallons of water - Adjust and maintain pH at 7.2-7.6 - Maintain total alkalinity in the range of 60 to 120 - One bag of this product per 10,000 gallons of water provides 5 to 10 ppm available chlorine - 68% Calcium Hypochlorite ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B009S85LEA | | Best Sellers Rank | #3,035 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #34 in Swimming Pool Chlorine | | Brand | DryTec | | Brand Name | DryTec | | Customer Reviews | 4.6 out of 5 stars 703 Reviews | | Item Form | Granular | | Item Type Name | Pool Shock | | Manufacturer | Robelle Industries | | Manufacturer Part Number | 23209 | | Model Number | 1-1901 | | Number of Items | 24 | | Product Benefits | Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water | | UPC | 073187000187 073187232090 | | Unit Count | 16.0 Ounce | ## Product Details - **Brand:** DryTec - **Item Form:** Granular - **Number of Items:** 24 - **Product Benefits:** Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water - **UPC:** 073187000187 073187232090 ## Images ![DryTec 1-1901 Calcium Hypochlorite Pool Shock, 1-Pound - Image 1](https://m.media-amazon.com/images/I/71NKHt2yLNL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***N on July 12, 2022* ### ⭐⭐⭐⭐⭐ Review *by S***O on February 19, 2026* ### ⭐⭐⭐⭐⭐ Review *by W***O on March 10, 2026* ## Frequently Bought Together - DryTec 1-1901 Calcium Hypochlorite Pool Shock, 1-Pound - Potable Aqua Water Purification Tablets with PA Plus, Portable and Effective Solution for Camping, Hiking, Emergencies, Natural Disasters and International Travel, Two 50ct Bottles - Reliance Products Aqua-Tainer 7 Gallon Rigid Water Container, Blue , 11.3 Inch x 11.0 Inch x 15.3 Inch --- ## 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.kr/products/12453145-drytec-1-1901-calcium-hypochlorite-pool-shock-1-pound](https://www.desertcart.kr/products/12453145-drytec-1-1901-calcium-hypochlorite-pool-shock-1-pound) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-05-13*