--- product_id: 49282298 title: "511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid" brand: "aquachek" price: "€ 31.76" currency: EUR in_stock: true reviews_count: 13 category: "Aqua Chek" url: https://www.desertcart.hr/products/49282298-511244a-swimming-pool-and-spa-test-strip-yellow-chlorine-ph store_origin: HR region: Croatia --- # UV stabilizer (Cyanuric Acid) detection Precise chemical balance monitoring 4-in-1 rapid test in seconds 511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid **Brand:** aquachek **Price:** € 31.76 **Availability:** ✅ In Stock ## Summary > 💧 Dive into crystal-clear confidence with every dip! ## Quick Answers - **What is this?** 511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid by aquachek - **How much does it cost?** € 31.76 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/49282298-511244a-swimming-pool-and-spa-test-strip-yellow-chlorine-ph) ## Best For - aquachek enthusiasts ## Why This Product - Trusted aquachek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Results:** Read accurate water chemistry in just 30 seconds—no waiting, no guesswork - • **Trusted & Proven:** Over 13,000+ 5-star reviews confirm reliable, consistent water testing every time - • **User-Friendly Design:** Easy-grip bottle with flip-top dispenser for hassle-free strip access - • **UV Protection Insight:** Monitor Cyanuric Acid levels to safeguard your pool from sun-driven chlorine loss - • **Quadruple Action Testing:** Get Free Chlorine, pH, Total Alkalinity & Cyanuric Acid results in one quick dip ## Overview AquaChek 511244A Yellow 4-in-1 test strips deliver fast, reliable readings for Free Chlorine, pH, Total Alkalinity, and Cyanuric Acid, essential for maintaining safe and balanced pool and spa water. Designed for ease of use with a convenient flip-top dispenser, these 50-count strips provide professional-grade water chemistry insights in just seconds, helping you protect your investment and enjoy pristine water all season long. ## Description Product Description Aquachek Yellow 4 way test strips Tests for: Free Chlorine, pH, Total Alkalinity, Cyanuric Acid (Stabilizer). Ideal for customers who use chlorine as the sanitizer in their pool or spa. Includes a test for Cyanuric Acid (Stabilizer), which is especially important for outdoor pools and spas which are subject to chlorine dissipation from UV rays. Get 4 important test results in just one dip! Just dip an AquaChek Yellow strip in your pool or spa water for one second and remove it immediately. You get test results in seconds! To keep you pool water clean and healthy, test the water at two ends or sides of the pool a minimum of twice a week! If used in a spa we recommend testing it before and after each use. It's also a good idea to write down your results each time you test. Tests for 4 important chemistry in seconds: Free Chlorine, pH, Total Alkalinity, Cyanuric Acid (Stabilizer). User friendly easy-grip bottle with flip-top strip dispenser cap. Includes water chemistry insert and full instructions. Directions Dip the test strip into the water of your pool or spa for a few seconds and compare the colours with the back of the glass. Read the test result within 30 seconds. Box Contains 1 x 1 pack of test strips containing 50 strips Review: Quick test results . Simple to Use - The product is Genuine and works superbly . Not complicated and results of test simple and clear to understand. Review: Reliable tests - I've tried a few hot tub test strips with varying success. These seem to produce clear consistent results every time. The colours are easy to read to determine the levels allowing me to keep the water conditions safe for use. ## Features - Aquachek Yellow 4in1 test strips - Tests for: Free Chlorine, pH, Total Alkalinity, Cyanuric Acid (Stabilizer) - Get 4 important test results in just one dip ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003TQM9XS | | Best Sellers Rank | 1,231 in Garden ( See Top 100 in Garden ) 6 in Pool & Hot Tub Testers | | Brand | AquaChek | | Country Of Origin | USA | | Customer Reviews | 4.7 out of 5 stars 13,862 Reviews | | Global Trade Identification Number | 00090944012429 | | Item Type Name | swimming pool and spa test strips | | Item Weight | 0.04 Kilograms | | Manufacturer | Hach | | Manufacturer Part Number | 511244 | | Material Type | Plastic | | Model Number | 511244 | | Recommended Uses For Product | swimming pool | | Recommended uses for product | swimming pool | | Sterility Rating | [Manufacturer Specified] | | UPC | 090944012429 090944021056 | | Unit Count | 50.0 count | | Unit count | 50.0 count | | pH range | [Manufacturer Specified] | ## Product Details - **Brand:** AquaChek - **Manufacturer:** Hach - **Recommended uses for product:** swimming pool - **Unit count:** 50.0 count - **pH range:** [Manufacturer Specified] ## Images ![511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid - Image 1](https://m.media-amazon.com/images/I/51MY8be+uyL.jpg) ![511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid - Image 2](https://m.media-amazon.com/images/I/71OVLE0C9OL.jpg) ![511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid - Image 3](https://m.media-amazon.com/images/I/81YP-dCvFCL.jpg) ![511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid - Image 4](https://m.media-amazon.com/images/I/71dEo1R8kpL.jpg) ![511244A Swimming Pool and Spa Test Strip, Yellow | Chlorine, Ph, Total Alkalinity, Cyanuric Acid - Image 5](https://m.media-amazon.com/images/I/81NAwdR+umL.jpg) ## Questions & Answers **Q: How do I use these pool test strips?** A: Just dip and check—it’s that simple. Dip one test strip into your pool or spa water and remove it immediately. Hold the strip level (don’t shake off water) for 15 seconds, then compare the color pads to the chart on the bottle. **Q: Do pool test strips expire?** A: Yes, AquaChek pool test strips expire 18 months from the date of manufacture. To ensure accuracy, always check the expiration date printed on the top of the bottle cap before use. Using expired strips may result in incorrect readings. **Q: Why are there 50 test strips in each bottle?** A: Limiting the bottle to 50 pool test strips helps ensure you’re using fresh, accurate strips throughout the season—especially since water chemistry readings are most reliable when the strips are fresh. **Q: Should I stock up on pool water test strips?** A: If you're testing your pool once a week as recommended a single bottle of 50 Yellow test strips is more than enough to last an entire swim season. There's no benefit to overstocking. Keep your bottle sealed and stored properly, and you'll be covered. **Q: How should I store the pool test strips?** A: Keep the test strip bottle tightly closed in a cool, dry place, away from sunlight and moisture. Do not remove the desiccant packet inside—it helps preserve strip accuracy. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quick test results . Simple to Use *by G***N on 28 November 2025* The product is Genuine and works superbly . Not complicated and results of test simple and clear to understand. ### ⭐⭐⭐⭐⭐ Reliable tests *by J***H on 24 June 2025* I've tried a few hot tub test strips with varying success. These seem to produce clear consistent results every time. The colours are easy to read to determine the levels allowing me to keep the water conditions safe for use. ### ⭐⭐⭐⭐⭐ Good for checking pool chemical requirements *by A***R on 18 June 2025* Easy to use ## Frequently Bought Together - AquaChek Yellow 4-Way Pool and Spa Test Strips - 50 Yellow Test Strips - Swimming Pool Test Strips For pH, Free Chlorine, Total Alkalinity, and Cyanuric Acid - Quick and Accurate Results - Testing Kit - AquaChek Salt Test Strip Titrators for Pools - Salt Water Pool Test Strips for Sodium Chloride - Quick and Accurate Results - Professional Water Quality Testing Kit (10 Strips) - Clorox® Pool&Spa™ Swimming Pool Chlorine Stabilizer, Helps Chlorine Last Longer, Saltwater Pool Compatible, 4LB (Pack of 1) --- ## 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/49282298-511244a-swimming-pool-and-spa-test-strip-yellow-chlorine-ph](https://www.desertcart.hr/products/49282298-511244a-swimming-pool-and-spa-test-strip-yellow-chlorine-ph) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-21*