JNW 7-in-1 Pool Test Strips, 100 Quick & Accurate Test Strips for Pool Water, Spa Test Strips for Hot Tub, Chlorine Test Strips, Bromine, pH, Alkalinity, Hardness & More - Swimming Pool Test Kit

I find these to be as accurate as any other similar strips. The chlorine, the hardness, and the alkalinity are easy to read. the ph is marginal. The CYA is difficult to read. Overall, these are good but not as good as a liquid chemical test. I run a saltwater 25k gallon pool.

These strips are very easy to use and the results are easy, straightforward to read. You do have to work very quickly for accurate results but after using them a few times you’ll get a routine down and have no issues. They offer a free ebook/manual that provides very detailed instructions as well as descriptions of each chemical, the dangers of having too little/too much of it in your pool/spa and how to correct & maintain proper levels. You’re able to print this ebook right from their website as a PDF.Ordered these strips after clearing up algae that left us with insane cloudiness afterwards that we couldn’t clear no matter what we tried. Spent a few hundred dollars at our local pool store on all their recommended chemicals that didn’t work. Took in multiple water samples for them to tell us everything was perfectly within normal range but “here use this, it’ll clear ya right up”. These strips immediately showed us our chlorine & bromine levels were off the charts too high, alkalinity way too low. Once correcting those levels we’re slowly getting back to crystal clear water. I highly recommend these strips, we’ve added these as a product to purchase yearly for our very short Northeast Ohio pool seasons.

Overall, the Water Hardness Test Kit - Quick and Relatively Accurate is an good choice for anyone wanting to easily and quickly assess the hardness of their water. It is simple, affordable, and effective for everyday use, and it offers a great value for those looking to ensure the quality of their household water. Whether you’re dealing with the effects of hard water or just want to stay informed, this kit delivers precise readings in an accessible and easy-to-understand format

This product gives actual values to the color coded markings. Makes it easier to make chemical adjustments to the pool.

so I got this for our hot tub and even at the nice low price it’s still a bit high, I have used these in the past and they work out fine as long as you follow the instructions. They’re fairly accurate and for a hot tub and pool they’re fine. I would not use them in a medical institution, however. Overall, to keep us safe in the water they do just fine.

This company is the absolute best when it comes to customer service!!! I would buy this product again simply for how much they went out of their way to help me solve an issue with my old strips showing an odd color. Turns out my old strips had expired and I didn’t know it.The product works great too!

It is inexpensive, fast, and easy. Accuracy is questionable though, and that is problematic for me. I think I have gotten mostly accurate readings over the last several uses, but I did not double check all the measurements to test if what I think is correct or not.I cannot rely on these tests strips for an accurate reading of free chlorine today. In the first picture, the color range result for the free chlorine test strip looks like 0-.5ppm. It is the third row (the text strip is longer than the bottle). If I solely relied on this reading, I would have added chlorine to increase the chlorine level.That would have been a mistake. Yesterday, the free chlorine reading in my pool was 3.44ppm, which is a little high. I live in South Florida, and it rained yesterday and overnight, so I expected a small drop in free chlorine, but not this. I tested the water, immediately after this test strip reading, with a digital meter, and the free chlorine reading is actually 2.51ppm.I bought this product hoping to lower the amount of times I use more expensive test strips for my digital meter. Unfortunately, that expectation was too high. I would only use this product in between tried and true testing for a red flag.

I had a whole-home HALO5 filtration system installed recently and felt like our water was much harder than when we only had a water softener. Bought a box of these to check for hardness. Easy to use and the hardness registers almost immediately. IF YOU HAVE HARD WATER, you need to check them within 30 seconds or so, otherwise the color of the test changes (see picture). When the filtration guy came out to check the HALO5 system, he read the strip immediately, and after a few minutes and said it wasn't that hard. I asked him to use another strip and that they were supposed to be read within 30 seconds. Within just a few minutes, it starts showing the original color of the test strip (which is green for soft). You can still see some of the rust color, but the green definitely shows through. I tried this with distilled (soft) water and the test color showed very soft. After an hour it was the same color just a bit lighter. BE SURE TO READ THE STRIP WITHIN 30 SECONDS FOR ACCURACY!