--- product_id: 3032655 title: "Extra Strength Stain Free, 1.75 lb, Single, Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems" brand: "natural chemistry" price: "€ 68.26" currency: EUR in_stock: true reviews_count: 9 category: "Natural Chemistry" url: https://www.desertcart.hr/products/3032655-extra-strength-stain-free-1-75-lb-single-removes-metal store_origin: HR region: Croatia --- # Compatible with all sanitizing systems All-natural & phosphate-free Industrial-strength ascorbic acid Extra Strength Stain Free, 1.75 lb, Single, Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems **Brand:** natural chemistry **Price:** € 68.26 **Availability:** ✅ In Stock ## Summary > 💧 Say goodbye to stains, hello to crystal-clear pool perfection! ## Quick Answers - **What is this?** Extra Strength Stain Free, 1.75 lb, Single, Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems by natural chemistry - **How much does it cost?** € 68.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/3032655-extra-strength-stain-free-1-75-lb-single-removes-metal) ## Best For - natural chemistry enthusiasts ## Why This Product - Trusted natural chemistry brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Friendly & Safe:** Phosphate-free, non-toxic formula that keeps your pool and planet happy. - • **Universal Compatibility:** Works seamlessly with every pool sanitizing system—no compromises. - • **Proven Results, Trusted Brand:** Backed by thousands of 5-star reviews and a top rank in pool stain removers. - • **Complete Stain Fighting System:** Pairs perfectly with Metal Free for a 1-2 punch against all pool stains. - • **Powerful Metal Stain Eliminator:** Harnesses industrial-strength ascorbic acid to erase stubborn metal stains fast. ## Overview Natural Chemistry Extra Strength Stain Free is a powerful, all-natural pool stain remover featuring industrial-strength ascorbic acid. It quickly eliminates metal stains without adding phosphates, is compatible with all sanitizing systems, and is proven effective by thousands of satisfied users. Ideal for tough, set-in stains, it supports a cleaner, whiter pool while being environmentally responsible. ## Description This Natural Chemistry extra strength stain free is an all natural stain remover that contains a blend of industrial strength ascorbic acid. It quickly removes metal staining without adding phosphates to your water. Tough on old set-in stains. Compatible with all sanitizing systems. Non-toxic, environmentally friendly and phosphate free. Recommended dose is 1-pound per 10,000-gallons of water. It can applied by following way that balance pool water and lower chlorine level to at least 1 ppm. Then add stain free as per dosage around the perimeter of the pool with the pump running. Brush pool thoroughly. After brushing, if stains are not completely removed add more strain free extra strength. Add a pulp based filter aid to your cartridge or sand filter. If you have a DE filter, make sure it is properly charged. Add metal free at a rate of 33.9-ounce per 20,000-gallons of water. Vacuum pool slowly and thoroughly. Use metal free as a weekly maintenance product to guarantee a stain free pool. Includes 12 stain free container per pack. Comes in 1-3/4-pounds container. Review: This stuff really works!! - This is truly a great product. Works wonders on the worst stains in our pool. I absolutely love this stuff. Removes yellowing stains from the stairs as well as other areas of the pool. Works quickly and leaves the pool beautiful. I recommend this product for sure. Review: Really works! On plaster too. - I was skeptical of this, but it actually saved me a good $1000 from having a drain and acid wash done. I honestly didn’t know how to test ph or chlorine and just took a chance by pouring it in. Got rid of dark stains on white plaster that can happen when the chemistry is off from time to time. Returned to a white color. Couldn’t be happier. ## Features - All Natural Stain Eliminator: Natural Chemistry Stain Free Extra Strength is ideal for treating metal staining on all pool surfaces. This natural stain remover contains a blend of industrial strength ascorbic acid to quickly remove metal staining without adding phosphates to your water. - Tough on Old Set-in Stains: The industrial strength ascorbic acid makes this stronger for use on more stubborn stains caused by metals. - Compatibility: Extrs Strength Stain Free is compatible with all sanitizing systems. - Stain Fighting: Use with Natural Chemistry Metal Free for the ultimate 1-2 combination for stain fighting. - Tested and Proven Effective: Natural Chemistry products are known for delivering reliable results and making water care less complex. Natural Chemistry carries an extensive line of pool and spa solutions that match your unique needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00C5L7NWU | | Best Sellers Rank | #16,295 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #20 in Swimming Pool Stain Removers | | Brand Name | Natural Chemistry | | Customer Reviews | 4.6 4.6 out of 5 stars (1,417) | | Global Trade Identification Number | 00717108073958 | | Item Form | Liquid | | Item Weight | 16 ounces | | Manufacturer | Natural Chemistry | | Product Benefits | Whitening | | UPC | 717108073958 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Natural Chemistry - **Item Form:** Liquid - **Item Weight:** 16 ounces - **Product Benefits:** Whitening - **UPC:** 717108073958 ## Images ![Extra Strength Stain Free, 1.75 lb, Single, Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems - Image 1](https://m.media-amazon.com/images/I/41WPCm7WarL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This stuff really works!! *by T***T on September 2, 2025* This is truly a great product. Works wonders on the worst stains in our pool. I absolutely love this stuff. Removes yellowing stains from the stairs as well as other areas of the pool. Works quickly and leaves the pool beautiful. I recommend this product for sure. ### ⭐⭐⭐⭐⭐ Really works! On plaster too. *by C***D on June 17, 2025* I was skeptical of this, but it actually saved me a good $1000 from having a drain and acid wash done. I honestly didn’t know how to test ph or chlorine and just took a chance by pouring it in. Got rid of dark stains on white plaster that can happen when the chemistry is off from time to time. Returned to a white color. Couldn’t be happier. ### ⭐⭐⭐⭐⭐ Great rust stain remover! *by R***Z on July 17, 2025* This worked great to remove rust stains! I tried physically scrubbing the stain with zero change. In the first I tire, you can see two rust stains. There’s another one to the side. So I put this product in a tube sock. Added a rock. Tied off the sock. Dropped it on top of the first stain, rock side up, shown in the picture. 5 minutes later it was almost all gone. Repeated for all three spots for 10-30 minutes and they’re all completely gone!! I didn’t have to use so much product and we can get the pool opened sooner than treating the 27k gallon pool. I did sprinkle one can around the edges and the sides are all clearing from slight discoloration. The pool looks perfect! I’m super pleased! Highly recommend! ## Frequently Bought Together - Natural Chemistry 07395 Extra Strength Stain Free, 1-3/4-Pound - Natural Chemistry 07001 Metal Free 1 Liter - CuLator Metal Eliminator & Stain Preventer for Pools & Spas PowerPak 1.0 --- ## 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.hr/products/3032655-extra-strength-stain-free-1-75-lb-single-removes-metal](https://www.desertcart.hr/products/3032655-extra-strength-stain-free-1-75-lb-single-removes-metal) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-24*