--- product_id: 156829918 title: "Yellow Treat Mustard Algaecide 5 oz" brand: "united chemical" price: "$30.68" currency: USD in_stock: true reviews_count: 8 category: "United Chemical" url: https://www.desertcart.us/products/156829918-yellow-treat-mustard-algaecide-5-oz store_origin: US region: United States of America --- # 24-hour rapid algae kill 5 oz concentrated dose metal-free, no staining Yellow Treat Mustard Algaecide 5 oz **Brand:** united chemical **Price:** $30.68 **Availability:** ✅ In Stock ## Summary > ⚡ Clear pools, zero hassle—beat algae before it beats you! ## Quick Answers - **What is this?** Yellow Treat Mustard Algaecide 5 oz by united chemical - **How much does it cost?** $30.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/156829918-yellow-treat-mustard-algaecide-5-oz) ## Best For - united chemical enthusiasts ## Why This Product - Trusted united chemical brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Chlorine Synergy Boost:** Works with your chlorine to leave a residual sanitizer reading - • **Fast-Track Pool Clarity:** Visible results in as little as 24 hours—no more endless brushing - • **Safe for All Pool Surfaces:** Zero metals means no blue or green stains on plaster, vinyl, or fiberglass - • **Versatile & Cost-Effective:** One 5 oz bottle treats 10,000 gallons, compatible with all pool types - • **Surgical Strike on Mustard Algae:** Penetrates protective slime to eradicate algae fast ## Overview United Chemical Yellow Treat Mustard Algaecide is a highly concentrated, metal-free granular formula designed to penetrate and destroy stubborn mustard algae within 24 hours. Safe for all pool surfaces and compatible with chlorine and saltwater systems, it enhances chlorine’s effectiveness while preventing staining and reducing maintenance time. ## Description The Industry Standard for Eradicating Stubborn Mustard Algae If you are frustrated by yellow dust that keeps coming back on the walls no matter how many times you shock and brush the pool, United Chemical Yellow Treat 2 is your specialized problem-solver. Mustard algae is notoriously resistant to standard chlorine because it forms a protective slime layer. When you simply brush it without a specialized killing agent, you are just moving the infection around the pool to grow back the next day. Yellow Treat 2 is a surgical strike. It penetrates the algae's defense mechanisms and uses your pool's chlorine to destroy the spores completely. Instead of turning your pool maintenance into a massive headache, Yellow Treat 2 turns it into a simple, standard stop. It eliminates the need for hours of wire-brushing and prevents you from wasting massive amounts of liquid chlorine week after week. Key Benefits: Direct Kill Technology: Kills the live algae directly, regardless of phosphate levels. No Staining: Contains absolutely no copper or heavy metals, protecting your pool's finish. Cost-Effective: Far more affordable per dose than expensive Polyquat 60 algaecides. Directions for Use: Broadcast 5 ounces of Yellow Treat 2 per 10,000 gallons directly over the greenest/yellowest parts of the pool. Immediately follow up with your standard liquid chlorine or shock. Run the pump 24/7 until the algae vanishes. Review: The yellow algicide works to clear it up in your pool. I have done it twice !! - The product works very well.But It was packaged with the No Mor liquid treatment & there was no protective covering gs on bottle & it was delivered upside down so it leaked on the 2 pkgs of algae treatment & I got it on my hands & it burns skin & can leave scars if bad enough .my hand was burning so I washed it off immediately & tried to tell customer service but to no avail , I hope they read this and make changes on the packaging of the No Mor product 👍 Review: Follow the directions - I purchased a similar package at our local Pinch a Penny store. I followed the directions and it did not totally clear the mustard algae. I purchased this product and followed the directions. I cleaned the filter and started the pump. I brushed the stairs and sides of the pool and added this 5 Oz package around the perimeter. Then added 1-gallon of liquid chlorine to the pool. It was less than 24 hours and the algae was totally gone and the water was clear. Highly recommend this product. ## Features - THE "ONE-SHOT" MUSTARD ALGAE SOLUTION: Mustard algae has a protective slime layer that standard chlorine struggles to penetrate. Yellow Treat 2 acts as a powerful accelerator, breaking down that defense layer and utilizing your chlorine to kill the algae from the inside out - RESULTS IN 24 HOURS: Stop brushing your arm off and shocking your pool multiple times a week. Simply broadcast Yellow Treat 2 over the algae, shock immediately, run your filter 24/7, and watch the toughest yellow and mustard algae vanish in as little as 24 hours - 100% NON-STAINING & METAL-FREE: Unlike copper-based algaecides that carry a high risk of leaving permanent blue or green stains on your expensive pool surfaces, Yellow Treat 2 contains zero metals and zero ingredients that stain pools. It is safe for all plaster, vinyl, and fiberglass finishes - LEAVES A CHLORINE READING: Specifically formulated to eradicate tough algae while still leaving a residual chlorine reading. It works synergistically with your liquid chlorine or shock, giving you the best of both worlds: chlorine for sanitation and a targeted chemical strike for algae destruction - HIGHLY CONCENTRATED DOSAGE: A little goes a long way. Just add 5 ounces per 10,000 gallons of pool water. This 2 lb bottle provides multiple treatments to handle stubborn blooms and get your pool back to crystal clear - COMPATIBLE WITH ALL POOL TYPES: Works effectively in both saltwater and chlorine pools, as well as above ground and inground pool systems, providing versatile treatment options for various pool configurations - DIRECT KILL TECHNOLOGY: Eliminates live algae directly regardless of phosphate levels, providing a targeted approach that addresses the root cause of mustard and yellow algae infestations in your swimming pool ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00OOAPNF4 | | Best Sellers Rank | #13,658 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #105 in Swimming Pool Chlorine | | Brand | United Chemical | | Brand Name | United Chemical | | Customer Reviews | 4.2 out of 5 stars 440 Reviews | | Item Form | Granular | | Item Weight | 4.96 ounces | | Manufacturer | United Chemicals | | Manufacturer Part Number | YTP71 | | Model Number | YTP71 | | Number of Items | 1 | | Package Size Name | 5 oz | | Product Benefits | Kills mustard algae, Uses less chlorine, Works fast | | UPC | 730928001109 | | Unit Count | 5 Ounce | ## Product Details - **Brand:** United Chemical - **Item Form:** Granular - **Item Weight:** 4.96 ounces - **Product Benefits:** Kills mustard algae, Uses less chlorine, Works fast - **UPC:** 730928001109 ## Images ![Yellow Treat Mustard Algaecide 5 oz - Image 1](https://m.media-amazon.com/images/I/71pqXixNWJL.jpg) ![Yellow Treat Mustard Algaecide 5 oz - Image 2](https://m.media-amazon.com/images/I/71ZUpYtj+aL.jpg) ![Yellow Treat Mustard Algaecide 5 oz - Image 3](https://m.media-amazon.com/images/I/81sxerN8qxL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ The yellow algicide works to clear it up in your pool. I have done it twice !! *by N***S on August 22, 2026* The product works very well.But It was packaged with the No Mor liquid treatment & there was no protective covering gs on bottle & it was delivered upside down so it leaked on the 2 pkgs of algae treatment & I got it on my hands & it burns skin & can leave scars if bad enough .my hand was burning so I washed it off immediately & tried to tell customer service but to no avail , I hope they read this and make changes on the packaging of the No Mor product 👍 ### ⭐⭐⭐⭐⭐ Follow the directions *by G***K on May 1, 2025* I purchased a similar package at our local Pinch a Penny store. I followed the directions and it did not totally clear the mustard algae. I purchased this product and followed the directions. I cleaned the filter and started the pump. I brushed the stairs and sides of the pool and added this 5 Oz package around the perimeter. Then added 1-gallon of liquid chlorine to the pool. It was less than 24 hours and the algae was totally gone and the water was clear. Highly recommend this product. ### ⭐⭐⭐⭐⭐ Yellow algae. *by J***N on October 6, 2025* Had yellow algae in pool one bag cleared it up, great product, while buy again ## Frequently Bought Together - United Chemicals YTP71 5oz Bag Yellow Treat - Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1) - United Chemicals Yellow Treat® 2 Pound Container --- ## 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.us/products/156829918-yellow-treat-mustard-algaecide-5-oz](https://www.desertcart.us/products/156829918-yellow-treat-mustard-algaecide-5-oz) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-27*