--- product_id: 3032655 title: "Extra Strength Stain Free, 1.75 lb, Single Pack | Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems" brand: "natural chemistry" price: "2017141₫" currency: VND in_stock: true reviews_count: 9 category: "Natural Chemistry" url: https://www.desertcart.vn/products/3032655-extra-strength-stain-free-1-75-lb-single-pack-removes store_origin: VN region: Vietnam --- # 100% natural & phosphate-free Compatible with all sanitizing systems Industrial-strength ascorbic acid Extra Strength Stain Free, 1.75 lb, Single Pack | Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems **Brand:** natural chemistry **Price:** 2017141₫ **Availability:** ✅ In Stock ## Summary > 💧 Dive into crystal-clear perfection—because your pool deserves the best! ## Quick Answers - **What is this?** Extra Strength Stain Free, 1.75 lb, Single Pack | Removes Metal Stains from Pool Liners & Finishes, Compatible with All Sanitizing Systems by natural chemistry - **How much does it cost?** 2017141₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/3032655-extra-strength-stain-free-1-75-lb-single-pack-removes) ## 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 & Trusted Results:** Backed by rigorous testing and rave reviews for reliable stain removal. - • **Complete Stain Defense Duo:** Pairs perfectly with Natural Chemistry Metal Free for unstoppable stain prevention. - • **Powerful Metal Stain Eliminator:** Harnesses industrial-strength ascorbic acid to erase stubborn metal stains fast. ## Overview Natural Chemistry Extra Strength Stain Free is a 1.75 lb all-natural pool stain remover featuring industrial-strength ascorbic acid. It quickly and effectively eliminates metal stains without phosphates, is compatible with all sanitizing systems, and is designed for tough, set-in stains. Trusted by pool owners for reliable, eco-friendly stain removal and maintenance. ## 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 works!! - WOW WOW WOW My pool was very rusty and brown when we opened it this year. The liner is several years old, but I thought I would try this and it worked!! My pool looks clean again. Very satisfied! I followed the directions on the bottle. Review: Ingrond pool staining - This is a great product. Just make sure you have your water chemistry according to the directions ## 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 | |---------------|-------| | Brand | Natural Chemistry | | Global Trade Identification Number | 00717108073958 | | Item Form | Liquid | | Item Weight | 16 ounces | | Product Benefits | Prevents Stains | | UPC | 717108073958 | ## 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 Pack | 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 works!! *by A***! on July 6, 2026* WOW WOW WOW My pool was very rusty and brown when we opened it this year. The liner is several years old, but I thought I would try this and it worked!! My pool looks clean again. Very satisfied! I followed the directions on the bottle. ### ⭐⭐⭐⭐⭐ Ingrond pool staining *by T***D on July 19, 2026* This is a great product. Just make sure you have your water chemistry according to the directions ### ⭐⭐⭐⭐⭐ Makes a stained pool looking great in no time! *by T***S on June 18, 2026* Ascorbic acid, it works well! While this is a bit more than I'd prefer to pay for Ascorbic Acid, it is specifically labelled for pool use and unlike any of the Citric Acid products, does a better job without the nasty after affects those cheaper solutions use. Be aware that you'll need to bring your Chlorine down to zero and pH down to 7.2 or so before applying the dry acid. In the case of my pool, I actually needed a full second so be sure to get two if you think you need one. Apply some to the sides with a small cup (wish it came with one of these!) and in seconds to minutes, you'll see results. Make sure to have Algaecide without copper ready to be used, if needed. Otherwise, the other item you'll still need is their Metal Free product to suspend the metals until they can be trapped in your filters. Afterwards, you'll need to keep adding this, replace your filters which may help some and ultimately replace your water but for now, this makes a stained pool looking great in no time! ## 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.vn/products/3032655-extra-strength-stain-free-1-75-lb-single-pack-removes](https://www.desertcart.vn/products/3032655-extra-strength-stain-free-1-75-lb-single-pack-removes) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-09-06*