--- product_id: 712880616 title: "Rx Clear Mega Shock | 73% Calcium Hypochlorite | One Pound Bags | 1 Pack | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide" brand: "rx clear" price: "271.85 DT" currency: TND in_stock: true reviews_count: 5 category: "Rx Clear" url: https://www.desertcart.tn/products/712880616-rx-clear-mega-shock-73-calcium-hypochlorite-one-pound-bags store_origin: TN region: Tunisia --- # 1 lb treats 10,000 gallons - Efficient Coverage Best used at night - Maximize Chlorine Boost 73% Calcium Hypochlorite - Ultra-Powerful Sanitizer Rx Clear Mega Shock | 73% Calcium Hypochlorite | One Pound Bags | 1 Pack | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide **Brand:** rx clear **Price:** 271.85 DT **Availability:** ✅ In Stock ## Summary > 💧 Shock Your Pool Back to Life with Rx Clear Mega Shock! ## Quick Answers - **What is this?** Rx Clear Mega Shock | 73% Calcium Hypochlorite | One Pound Bags | 1 Pack | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide by rx clear - **How much does it cost?** 271.85 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/712880616-rx-clear-mega-shock-73-calcium-hypochlorite-one-pound-bags) ## 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 - • **Algae Defense Mode:** Use 2 lbs per 14,000 gallons to beat green algae and keep your pool pristine. - • **Triple-Action Power:** Sanitizes, clarifies, and kills algae for crystal-clear pool water. - • **Rapid Chlorine Boost:** High 73% calcium hypochlorite content delivers fast, effective shock treatment. - • **Smart Dosage Control:** 1 lb per 10,000 gallons ensures precise, cost-effective pool maintenance. - • **Nighttime Performance:** Apply at night and enjoy safe swimming after 8-10 hours for optimal results. ## Overview Rx Clear Mega Shock is a premium 1 lb granular pool treatment containing 73% calcium hypochlorite and 70% available chlorine. Designed as a multi-purpose sanitizer, clarifier, and algicide, it rapidly boosts chlorine levels to eliminate algae and maintain crystal-clear water. Ideal for above or in-ground pools, it treats 10,000 gallons per bag and works best when applied at night, ensuring your pool stays fresh, clean, and swim-ready. ## Description Rx Clear Mega Shock is a highly effective pool shock that sanitizes, clarifies, and controls algae all in one, giving you a crystal clear pool. Each 1 lb bag of Mega Shock contains: 73% Calcium Hypochlorite, and 70% available chlorine. Note: Cannot be sold or shipped to Maine. Features: - 1 x 1 lb bags - Highly effective and multi purpose - Sanitizes, clarifies, and controls algae - Eliminates odors - Will not over-stabilize your pool Benefits: All-in-One Treatment: Rx Clear Mega Shock clarifies, sanitizes, and controls algae all in one. Dosages: 1 lb. Mega Shock per 10,000 gallons of pool water. Active Ingredients: - 73% Calcium Hypochlorite - 27% Other Ingredients - 70% Available Chlorine Content Review: Worked for me - Works just as well as Leslie’s 73 cal hypo shock, but cheaper. I was having a problem trying to get my free chlorine level to even register on my test strips. 2lbs of this shock (mixed in a bucket 1 lb at a time) sky rocketed my free chlorine levels. My pic of the pool is a little cloudy due to the chlorine level being high right now, but I’m sure that will resolve itself over the next few days as the levels come down. It’s been crazy 90 degree hot every day around here for a couple of weeks now. The test strip pic is from today, 2 days after I put the shock in a couple of nights ago. Next week if the fc level is low, I’m going to try 1lb instead of 2, and see what happens with the increase in free chlorine levels. If u want a jolt in your free chlorine levels, this stuff works. Review: Great in emergencies. - Great stuff to have in an emergency for clean water. This one-pound bag will treat 10,000 gallons of water. ## 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 | B00O92NRGY | | Brand | Rx Clear | | Brand Name | Rx Clear | | Customer Reviews | 4.7 out of 5 stars 454 Reviews | | Item Form | Granular | | Item Weight | 454 g | | Item form | Granular | | Item weight | 454 g | | Manufacturer | Rx Clear | | Manufacturer Part Number | 204063 | | Model Number | 204063 | | Number of Items | 1 | | Number of Packs | 1 | | Package Size Name | Single Pack | | Product Benefits | Controls Algae | | Product benefits | Controls Algae | | UPC | 078399255516 | | Unit Count | 16 Grams | ## Product Details - **Brand:** Rx Clear - **Item form:** Granular, Powder - **Item weight:** 1 Pounds - **Product benefits:** Controls Algae - **UPC:** 078399255516 ## Images ![Rx Clear Mega Shock | 73% Calcium Hypochlorite | One Pound Bags | 1 Pack | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide - Image 1](https://m.media-amazon.com/images/I/71GOpweKGhL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: What are the ingredients in the package?** A: Don't know but it works great in my vinyl pool. Just make sure you run your filter when you put it in the pool. **Q: Will this suffice for water purification in emergency situations? I understand you have to make sure you get basic Pool Shock with no additives...** A: This stuff was old and rocky and didn’t do good on my pool. **Q: Can this be used for sanitizing drinking water in proper dilution. I have the formula but the recommended product was Ultima which is unavailable.** A: I don't think it's a good idea, I wouldn't try it. **Q: is product safe for vinyl pools?** A: I use it in my vinyl pool and it works great just run your pool filter when you use it. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked for me *by G***N on 15 July 2025* Works just as well as Leslie’s 73 cal hypo shock, but cheaper. I was having a problem trying to get my free chlorine level to even register on my test strips. 2lbs of this shock (mixed in a bucket 1 lb at a time) sky rocketed my free chlorine levels. My pic of the pool is a little cloudy due to the chlorine level being high right now, but I’m sure that will resolve itself over the next few days as the levels come down. It’s been crazy 90 degree hot every day around here for a couple of weeks now. The test strip pic is from today, 2 days after I put the shock in a couple of nights ago. Next week if the fc level is low, I’m going to try 1lb instead of 2, and see what happens with the increase in free chlorine levels. If u want a jolt in your free chlorine levels, this stuff works. ### ⭐⭐⭐⭐⭐ Great in emergencies. *by R***Y on 3 July 2026* Great stuff to have in an emergency for clean water. This one-pound bag will treat 10,000 gallons of water. ### ⭐⭐⭐⭐⭐ Good stuff *by B***L on 11 May 2026* This stuff really works. Highly recommended by my pool service for all their customers. ## Frequently Bought Together - Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | Single Pack - Intex 29002E Type A Pool Filter Cartridge Filter Pumps – Easy-to-Clean – Dacron Paper – Efficient Filtration – Two Pack - Clorox Pool&Spa XTRABLUE 3” Chlorinating Tablets, Individually Wrapped, Kills Bacteria & Stops Algae (5 LB) --- ## 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/712880616-rx-clear-mega-shock-73-calcium-hypochlorite-one-pound-bags](https://www.desertcart.tn/products/712880616-rx-clear-mega-shock-73-calcium-hypochlorite-one-pound-bags) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-21*