--- product_id: 1614864 title: "Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack" brand: "drytec" price: "1507.68 DT" currency: TND in_stock: true reviews_count: 8 category: "Dry Tec" url: https://www.desertcart.tn/products/1614864-drytec-1-1901-24-calcium-hypochlorite-chlorine-shock-treatment-swimming store_origin: TN region: Tunisia --- # Weekly shock treatment schedule 5-10 ppm chlorine per 10,000 gal 68% Calcium Hypochlorite purity Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack **Brand:** drytec **Price:** 1507.68 DT **Availability:** ✅ In Stock ## Summary > 💧 Shock your pool into perfection — because clear water is non-negotiable! ## Quick Answers - **What is this?** Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack by drytec - **How much does it cost?** 1507.68 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/1614864-drytec-1-1901-24-calcium-hypochlorite-chlorine-shock-treatment-swimming) ## 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 - • **Powerful Purity:** 68% calcium hypochlorite ensures rapid, effective pool sanitation. - • **Bulk 24-Pack Value:** Convenient 1-pound bags in a 24-pack keep your pool pristine all season long. - • **Optimized pH Balance:** Maintains ideal pH range of 7.2-7.6 for swimmer comfort and pool longevity. - • **Routine Shock Treatment:** Designed for weekly superchlorination to prevent algae and bacteria buildup. - • **Precision Chlorine Control:** Delivers 5-10 ppm available chlorine per 10,000 gallons for crystal-clear water. ## Overview Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment is a professional-grade granular pool shock designed to maintain optimal water quality. Each 1-pound bag treats 10,000 gallons, delivering 5-10 ppm available chlorine with 68% purity. It supports balanced pH (7.2-7.6) and alkalinity (60-120) for swimmer comfort and algae control. The 24-pack format ensures consistent weekly shock treatments, keeping pools crystal clear and bacteria-free throughout the season. ## 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. Review: Love this pool shock 68%Calcium Hypochlorite - I did a lot of research before I purchased this DryTec brand of hypochlorite chlorine pool shock. I usually use “In The Swim “brand of chemicals in my pool but when I was on desertcart I came across the DryTec . It got great reviews. I used my perplexity AI search engine and googled it as well. Nice high quality product works well . It’s 68% Calcium Hypochlorite. So it’s nice and strong. It keeps my water crystal clear. It’s very easy to use. I have an in ground gunite pool so I just open the bag and disperse it over the water in my deep end.My pool had 33,000 gallons of water so I use 3 one pound bags per application. I usually use it preventively once every 4 weeks. I don’t understand what a company that makes compressed air equipment has to do with pool chemicals but this company makes a great pool shock. I get the 24 pack size it was $114 last time I ordered it which is a great price. It’s is as good or better than the In The Swim shock I use to use. Review: Shock & Awe: The Terminator of Pool Shocks - I travel frequently, sometimes for extended periods of time, which makes pool maintenance without hiring a service a real pain. This is particularly troublesome with an in-ground pool in Florida in Summer that has no shade. I waited to post a review until after I'd ordered 2 separate batches to test for quality control, and quite simply: this is the BEST shock I've ever used. I've come back from trips to solid green slime pits with heavy stripes of the dreaded black spot algae, and 2-3bags of this stuff + a couple of chlorine tablets with the filter running will turn my pool back to blue overnight. Like other reviewers, I have noticed that my water is a little cloudy the next 24-32hrs--- but in my case, I chalk that up to so much dead organic material & algae that needs to be filtered out. This stuff kills ALL the nasty stuff--- but until it's vacuumed or filtered out, it's still in the water. It works when nothing else does, and does a better & faster job. It's also priced very competitively. If you have a problem pool, or a problem with regular maintenance, this stuff is AMAZING. It terminates even the most durable, hardened, and persistent algae with extreme prejudice, you just have to give your vacuum or filter a chance to clear the battlefield of all the millions of algae corpses once it's finished annihilating them, and then declare unconditional victory. If you're just looking for regular pool maintenance, this may be a little strong for your needs. I will say that when I'm around to take care of it, one bag of this every 2-3 weeks, plus a couple of chlorine tablets does the trick (without cloudiness). Where it really shines though is in rehabilitating seemingly terminally green monsters back into beautiful blue pools. ## 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 | B00BGNLUV8 | | Best Sellers Rank | #3,071 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #41 in Swimming Pool Chlorine | | Brand | DryTec | | Brand Name | DryTec | | Customer Reviews | 4.6 out of 5 stars 6,408 Reviews | | Item Form | Granular | | Item Type Name | Pool Shock | | Item Weight | 24 pounds | | Manufacturer | Robelle Industries | | Manufacturer Part Number | 1-1901--24 | | Model Number | 1-1901--24 | | Number of Items | 24 | | Number of Packs | 24 | | Package Size Name | 24-Pack | | Product Benefits | Destroys Organic Contaminants,Kills Bacteria,Controls Algae | | UPC | 034261003944 | | Unit Count | 384 Ounce | ## Product Details - **Brand:** DryTec - **Item Form:** Granular - **Item Weight:** 24 pounds - **Product Benefits:** Destroys Organic Contaminants,Kills Bacteria,Controls Algae - **UPC:** 034261003944 ## Images ![Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack - Image 1](https://m.media-amazon.com/images/I/81bOHPRRBvL.jpg) ![Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack - Image 2](https://m.media-amazon.com/images/I/71NKHt2yLNL.jpg) ![Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack - Image 3](https://m.media-amazon.com/images/I/71Zui32r9cL.jpg) ![Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack - Image 4](https://m.media-amazon.com/images/I/81Wqgr3PaGL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Love this pool shock 68%Calcium Hypochlorite *by W***M on June 26, 2025* I did a lot of research before I purchased this DryTec brand of hypochlorite chlorine pool shock. I usually use “In The Swim “brand of chemicals in my pool but when I was on Amazon I came across the DryTec . It got great reviews. I used my perplexity AI search engine and googled it as well. Nice high quality product works well . It’s 68% Calcium Hypochlorite. So it’s nice and strong. It keeps my water crystal clear. It’s very easy to use. I have an in ground gunite pool so I just open the bag and disperse it over the water in my deep end.My pool had 33,000 gallons of water so I use 3 one pound bags per application. I usually use it preventively once every 4 weeks. I don’t understand what a company that makes compressed air equipment has to do with pool chemicals but this company makes a great pool shock. I get the 24 pack size it was $114 last time I ordered it which is a great price. It’s is as good or better than the In The Swim shock I use to use. ### ⭐⭐⭐⭐⭐ Shock & Awe: The Terminator of Pool Shocks *by E***T on September 20, 2017* I travel frequently, sometimes for extended periods of time, which makes pool maintenance without hiring a service a real pain. This is particularly troublesome with an in-ground pool in Florida in Summer that has no shade. I waited to post a review until after I'd ordered 2 separate batches to test for quality control, and quite simply: this is the BEST shock I've ever used. I've come back from trips to solid green slime pits with heavy stripes of the dreaded black spot algae, and 2-3bags of this stuff + a couple of chlorine tablets with the filter running will turn my pool back to blue overnight. Like other reviewers, I have noticed that my water is a little cloudy the next 24-32hrs--- but in my case, I chalk that up to so much dead organic material & algae that needs to be filtered out. This stuff kills ALL the nasty stuff--- but until it's vacuumed or filtered out, it's still in the water. It works when nothing else does, and does a better & faster job. It's also priced very competitively. If you have a problem pool, or a problem with regular maintenance, this stuff is AMAZING. It terminates even the most durable, hardened, and persistent algae with extreme prejudice, you just have to give your vacuum or filter a chance to clear the battlefield of all the millions of algae corpses once it's finished annihilating them, and then declare unconditional victory. If you're just looking for regular pool maintenance, this may be a little strong for your needs. I will say that when I'm around to take care of it, one bag of this every 2-3 weeks, plus a couple of chlorine tablets does the trick (without cloudiness). Where it really shines though is in rehabilitating seemingly terminally green monsters back into beautiful blue pools. ### ⭐⭐⭐⭐⭐ It just flat out works! *by B***E on June 6, 2026* I love this shock! I have used plenty of other brands and nothing I have used seems to work quite as well as Drytec does. In only about 7 to 10 minutes, see the difference between the first two pictures. The next day my pool is totally clear and blue again, amazing! My pool is roughly 33,000 gallons and I used (3) of the 1lb bags. ## Frequently Bought Together - Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack - In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds - GLB 71205-SP-02BX Super Blue Pool Clarifier, 64-Ounces (Packaging May Vary) --- ## 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.tn/products/1614864-drytec-1-1901-24-calcium-hypochlorite-chlorine-shock-treatment-swimming](https://www.desertcart.tn/products/1614864-drytec-1-1901-24-calcium-hypochlorite-chlorine-shock-treatment-swimming) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-17*