--- product_id: 385540420 title: "Krowne Chlorine Test Strips, 100 Piece" brand: "krowne" price: "166 zł" currency: PLN in_stock: true reviews_count: 5 category: "Krowne" url: https://www.desertcart.pl/products/385540420-krowne-chlorine-test-strips-100-piece store_origin: PL region: Poland --- # Krowne Chlorine Test Strips, 100 Piece **Brand:** krowne **Price:** 166 zł **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Krowne Chlorine Test Strips, 100 Piece by krowne - **How much does it cost?** 166 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/385540420-krowne-chlorine-test-strips-100-piece) ## Best For - krowne enthusiasts ## Why This Product - Trusted krowne brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Krowne Chlorine Test Strips, 100 Piece : desertcart.in: Health & Personal Care Review: Simple and classic but still the best solution. The plastic case is also good to avoid moisture Review: I regularly make my own chlorine bleach. Sodium hypochlorite (household liquid bleach) degrades over time and has a shelf life of about 3-5 months. Rather than stock up on bleach only to have it deteriorate over time, I buy pool shock (calcium hypochlorite) and use it to mix up a fresh batch of bleach as needed. I not only have the ability to store extra bleach without having to worry about the shelf life, but I also save a lot of money - a 1 lb package of pool shock is about $4, which can make A LOT of gallons of bleach. I wanted to test the strength of my bleach after it was diluted in a gallon of water to make sure the concentration was correct. I suspected that the most recent gallon I made was not strong enough, and I used these test strips to confirm my suspicion. After adding a bit more calcium hypochlorite to the solution, I was able to get the concentration correct; the test strips were noticeably darker and easy to read. (Just to be clear, I was testing the gallon of water that I'd added bleach to, not the bleach directly). Keep in mind that these test strips are not designed to test chlorine levels in tap water; if that's your purpose, then you need to buy a different product; this type of test strip is designed to measure levels of chorine in different dilutions (added to water) so that you know there is enough to sanitize or disinfect surfaces. For most microorgansims (bacteria and viruses), a level of 200 ppm is considered adequate. For killing mold, a higher concentration is necessary (I believe 2,000 ppm). The CDC has a really helpful list of how many ppm of bleach is required to kill various pathogens. I am very pleased with these test strips; they were easy to use and allowed me to verify the strength of my solution. I also found that I was able to rip a test strip in half so that I can make them last even longer. If you have any questions, I'm happy to try to help. Please consider leaving me feedback below if you found this review helpful. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003Z9HWQ8 | | Are batteries included? | No | | Best Sellers Rank | #481,948 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #50 in Ketone Test Strips | | Brand | Krowne | | Customer Reviews | 4.2 4.2 out of 5 stars (339) | | Date First Available | 10 January 2015 | | Item Dimensions LxWxH | 10.2 x 1.3 x 7.6 Centimeters | | Item Height | 3 Inches | | Item Weight | 10 g | | Item Width | 0.5 Inches | | Item model number | S25-123 | | Model number | S25-123 | | Product Dimensions | 10.16 x 1.27 x 7.62 cm; 10 g | | Voltage | 1 Volts | ## Product Details - **Brand:** Krowne - **Global Trade Identification Number:** 00822196251239, 00822196951238 - **UPC:** 822196251239 671875507323 822196951238 123456000056 ## Images ![Krowne Chlorine Test Strips, 100 Piece - Image 1](https://m.media-amazon.com/images/I/31CW4KGCGmL.jpg) ![Krowne Chlorine Test Strips, 100 Piece - Image 2](https://m.media-amazon.com/images/I/51pFgCrAMYL.jpg) ## Questions & Answers **Q: how many?** A: 100 **Q: what is the actual range of chlorine that it tests for? it shows some ambiguous numbers, but what are the units of those numbers?** A: It ranges from 10,50,100,and 200 P.P.M (Parts Per Million) Available Chlorine **Q: Will this test fro strength of HOCl** A: No idea. They are test strips that turn color to meet a PH Level. **Q: How do you test chlorine in a pool with these strips? When I try strip stays white.** A: This is not used for testing chlorine in a pool. It is more used more testing the bleach mixture in your #3 cleaning solution like in a spray bottle.(100-200ppm). That will sanitize the clean areas, dishes, toys etc. Amazon has great Pool Testing Equipment kits and so on. Search for that. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***N on 24 July 2020* Simple and classic but still the best solution. The plastic case is also good to avoid moisture ### ⭐⭐⭐⭐⭐ Review *by A***I on 28 April 2017* I regularly make my own chlorine bleach. Sodium hypochlorite (household liquid bleach) degrades over time and has a shelf life of about 3-5 months. Rather than stock up on bleach only to have it deteriorate over time, I buy pool shock (calcium hypochlorite) and use it to mix up a fresh batch of bleach as needed. I not only have the ability to store extra bleach without having to worry about the shelf life, but I also save a lot of money - a 1 lb package of pool shock is about $4, which can make A LOT of gallons of bleach. I wanted to test the strength of my bleach after it was diluted in a gallon of water to make sure the concentration was correct. I suspected that the most recent gallon I made was not strong enough, and I used these test strips to confirm my suspicion. After adding a bit more calcium hypochlorite to the solution, I was able to get the concentration correct; the test strips were noticeably darker and easy to read. (Just to be clear, I was testing the gallon of water that I'd added bleach to, not the bleach directly). Keep in mind that these test strips are not designed to test chlorine levels in tap water; if that's your purpose, then you need to buy a different product; this type of test strip is designed to measure levels of chorine in different dilutions (added to water) so that you know there is enough to sanitize or disinfect surfaces. For most microorgansims (bacteria and viruses), a level of 200 ppm is considered adequate. For killing mold, a higher concentration is necessary (I believe 2,000 ppm). The CDC has a really helpful list of how many ppm of bleach is required to kill various pathogens. I am very pleased with these test strips; they were easy to use and allowed me to verify the strength of my solution. I also found that I was able to rip a test strip in half so that I can make them last even longer. If you have any questions, I'm happy to try to help. Please consider leaving me feedback below if you found this review helpful. ### ⭐⭐⭐⭐⭐ Review *by L***A on 26 October 2025* I use these to check for remaining bleach after sanitizing my well or after changing whole house filters and sanitizing. Cost effective. ## Frequently Bought Together - KROWNE Chlorine Test Strips, 100 Piece - 4 Pack Refrigerator Freezer Thermometer Large Dial Analog Thermometer - Micro Essential Labs Hydrion QT-40 Quaternary Sanitizer Test Tape 15 feet Roll Quat Color Chart 0-500 ppm Range --- ## 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.pl/products/385540420-krowne-chlorine-test-strips-100-piece](https://www.desertcart.pl/products/385540420-krowne-chlorine-test-strips-100-piece) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-27*