--- product_id: 741604042 title: "Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 12 Pack" brand: "rx clear" price: "£210.20" currency: GBP in_stock: true reviews_count: 5 category: "Rx Clear" url: https://www.desertcart.co.uk/products/741604042-rx-clear-mega-shock-73-calcium-hypochlorite-kills-algae-in store_origin: GB region: United Kingdom --- # Nighttime application - Maximize shock efficiency 73% Calcium Hypochlorite - Ultra concentrated power Multi-purpose sanitizer & algicide - Total pool defense Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 12 Pack **Brand:** rx clear **Price:** £210.20 **Availability:** ✅ In Stock ## Summary > 💧 Shock your pool into perfection—because clear water waits for no one! ## Quick Answers - **What is this?** Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 12 Pack by rx clear - **How much does it cost?** £210.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/741604042-rx-clear-mega-shock-73-calcium-hypochlorite-kills-algae-in) ## Best For - rx clear enthusiasts ## Why This Product - Trusted rx clear brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Dosing System:** 1 lb per 10,000 gallons ensures precise, effective maintenance without waste. - • **Algae-Free Guarantee:** Beat the green with 2 lbs per 14,000 gallons for a sparkling pool all season long. - • **Triple-Action Formula:** Sanitizes, clarifies, and kills algae in one powerful treatment—your all-in-one pool solution. - • **Nighttime Shock Advantage:** Apply after dark and enjoy a safe swim 8-10 hours later—optimized for your schedule. - • **Ultra-Concentrated Chlorine Power:** 73% calcium hypochlorite delivers a rapid, deep clean for crystal-clear water. ## Overview Rx Clear Mega Shock is a premium 73% calcium hypochlorite granular treatment designed to sanitize, clarify, and eliminate algae in swimming pools. Ideal for above or in-ground pools, it delivers fast-acting chlorine power with easy dosing instructions and works best when applied at night. Trusted by thousands for reliable, crystal-clear water maintenance. ## Description A powerful, highly dense chlorinated shock treatment that will remove the green algae from your swimming pool water by just following the recommended dosage of this product. Be sure to pre-dissolve this powdered substance in a bucket of water before dispensing it around the perimeter of your swimming pool while your pump is running. NOTE: Cannot be sold or shipped to Maine. Review: Worked for me Review: 73% Cal FTW! ## Features - MULTI-PURPOSE - This swimming pool shock works as a strong sanitizer, clarifier, and algicide for clear blue water. - EXTRA POWER - Due to its high percentage of chlorine, Mega Shock is a very effective treatment for a quick chlorine boost. The Rx Clear Mega shock packets are chlorinating essentials. - MIX BEFORE YOU FIX - Add this granular powder to a bucket of water before you begin dissolving it in your pool. Add a 1 lb bag per 10,000 gallons of pool water for smart maintenance. - BEAT THE GREEN - Keep in your swimming pool algae free by adding 2 bags (2 lbs) of shock per 14,000 gallons of pool water. These granules work as an algaecide if your pool needs cleaning, or if you're opening for the season. - WORKS BEST AT NIGHT - Maximize performance by adding this shock to your pool at night. Wait to swim 8 to 10 hours after you start the application. Trust Rx Clear to supply reliable chemicals, supplies, and equipment for your above or in ground pool, spa or hot tub. - NOTE: Cannot be sold or shipped to Maine. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00O92NRGO | | Brand | Rx Clear | | Brand Name | Rx Clear | | Customer Reviews | 4.7 out of 5 stars 433 Reviews | | Item Form | Granular, Powder | | Item Weight | 454 g | | Item form | Granular, Powder | | Item weight | 454 g | | Manufacturer | Rx Clear | | Product Benefits | Controls Algae | | Product benefits | Controls Algae | | UPC | 617215599535 | | Unit Count | 192.0 Grams | | Unit count | 192.0 Grams | ## Product Details - **Brand:** Rx Clear - **Item form:** Granular, Powder - **Item weight:** 454 g - **Product benefits:** Controls Algae - **UPC:** 617215599535 ## Images ![Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 12 Pack - Image 1](https://m.media-amazon.com/images/I/71BoV93eQcL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked for me *by G***N on 15 July 2025* ### ⭐⭐⭐⭐⭐ 73% Cal FTW! *by B***Y on 13 July 2025* ### ⭐⭐⭐⭐⭐ Excellent shock. *by B***P on 6 August 2024* --- ## 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.co.uk/products/741604042-rx-clear-mega-shock-73-calcium-hypochlorite-kills-algae-in](https://www.desertcart.co.uk/products/741604042-rx-clear-mega-shock-73-calcium-hypochlorite-kills-algae-in) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-26*