--- product_id: 644856126 title: "52040B, Swimming Pool Care Shock Ultra, 6 Pack" brand: "hth" price: "₩290647" currency: KRW in_stock: true category: "Hth" url: https://www.desertcart.kr/products/644856126-52040b-swimming-pool-care-shock-ultra-6-pack store_origin: KR region: South Korea --- # Fast-dissolving Cal Hypo formula Visible blue action indicator Compatible with all pool types 52040B, Swimming Pool Care Shock Ultra, 6 Pack **Brand:** hth **Price:** ₩290647 **Availability:** ✅ In Stock ## Summary > 💧 Shock your pool into sparkling perfection—because clear water is the new cool! ## Quick Answers - **What is this?** 52040B, Swimming Pool Care Shock Ultra, 6 Pack by hth - **How much does it cost?** ₩290647 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/644856126-52040b-swimming-pool-care-shock-ultra-6-pack) ## Best For - hth enthusiasts ## Why This Product - Trusted hth brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Clarity Boost:** Dissolves quickly to restore crystal-clear water within hours - • **Multi-Problem Solver:** Eliminates bacteria, algae, stains, and scale in one powerful treatment - • **Blue Action Assurance:** Unique blue color signals active sanitization in real-time - • **All-Pool Compatibility:** Safe and effective for vinyl, saltwater, and all pool systems - • **Simple, Reliable Maintenance:** Use weekly with HTH test strips to prevent 90% of pool issues effortlessly ## Overview HTH 52040B Swimming Pool Care Shock Ultra is a fast-acting, granular Cal Hypo formula designed to sanitize all pool types without adding cyanuric acid. Its visible blue action indicator confirms effectiveness while preventing bacteria, algae, stains, and scale. Packaged in a convenient 6-pack, it offers a reliable, easy-to-use solution for maintaining crystal-clear, soft, and irritation-free pool water. ## Description HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1lb (6 Pack) ## Features - BENEFIT: Use this all-in-one powerhouse pool shock to increase chlorine levels, prevent bacteria, algae, stain, and scale, reduce skin and eye irritation, improve filtration, and soften your swimming pool water quickly and easily - VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock - VISIBLE BLUE ACTION: This built-in feature lets you know the product is working - COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems - YOU'RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly; Use weekly to solve 90% of pool problems within 24 hours and restore crystal clarity ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09R81TQBS | | Brand Name | HTH | | Customer Reviews | 4.7 4.7 out of 5 stars (605) | | Included Components | HTH 52040 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1lb (Pack of 6) | | Item Form | Granular | | Item Highlight | Swimming Pool Chemical; Cal Hypo Formula; All-in-One Pool Shock to Increase Chlorine Levels; Visibly Brilliant Sparkle | | Item Type Name | Swimming Pool Chemical Prevents Bacteria, Algae, Stain & Scale, Cal Hypo Formula | | Item Weight | 6.3 Pounds | | Manufacturer | Innovative Water Care | | Manufacturer Part Number | 52040B | | Model Number | 52040B | | Number of Items | 1 | | Number of Packs | 6 | | Package Size Name | 6 Pack | | Product Benefits | Kills Bacteria | | UPC | 073187520401 | | Unit Count | 6 Count | ## Product Details - **Brand:** HTH - **Item form:** Granular - **Item weight:** 6.3 Pounds - **Product benefits:** Kills Bacteria - **UPC:** 073187520401 ## Images ![52040B, Swimming Pool Care Shock Ultra, 6 Pack - Image 1](https://m.media-amazon.com/images/I/81aKILdYRbL.jpg) ## Questions & Answers **Q: Can this replace weekly chlorine?** A: This is a sanitizer that is used as weekly shock or your regular sanitizer maintenance. The amount you use for weekly shock and the amount for maintenance is different based upon the pool water volume. Ideally, this is used for Shock but we can help with regular maintenance dose if you choose to not use a tablet in your skimmer. Please consider calling our Consumer Engagement Team for more precise recommendations and dosing details. We're available M-F, 9 AM - 7 PM at 866-484-7665. **Q: What is the percentage of available chlorine?** A: This product has 56.44% available chlorine. **Q: How long do you have to wait after adding shock before you can swim?** A: The general rule is to wait at least an hour per pound of granular product, to allow it to dissolve and dilute properly. Before you enter the pool, make sure to test and that the chlorine level is between 1-4 ppm (and NOT ABOVE 5 ppm) for the safest swimming. **Q: 1 bag treats how many gallons water** A: We are the manufacturer of HTH® Pool Care Shock Ultra and one of our 1 lb. bags treats 13,500 gallons of swimming pool water. If you have any more questions just give us a call at 866-484-7665. ## Frequently Bought Together - HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1lb (6 Pack) - HTH 67067 Swimming Pool Care Clarifier Advanced - Crystal Clear Water in 24 Hours - HTH 52038 Swimming Pool Care Green to Blue, Advanced Shock System, 2-Step Swimming Pool Care Solution, 1 Kit --- ## 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/644856126-52040b-swimming-pool-care-shock-ultra-6-pack](https://www.desertcart.kr/products/644856126-52040b-swimming-pool-care-shock-ultra-6-pack) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-10-31*