Water Hardness Test Kit - Quick and Accurate Water Hardness Test Strips - Hard Water Test Kit with eBook - Ultimate Test Kit for Water Hardness - 150 Water Softener Test Strips by JNW Direct

I've been buying a different brand for years .. because of price gouging .. I was forced to shop around .. I feel real fortunate that I took a chance on these .. the quantity for the price made me suspect .. I was paying .. I think I remember over $20 for 100 strips .. Very pleased with this purchase .. these strips are spot on accurate and the quantity is unbelievable compared to the other 1USE strips I was way over paying for. DYI POOL OWNERS .. AS I'VE OWNED POOLS FOR OVER 25 YRS .. I TELL YA . YOU CAN TRUST THESE STRIPS .. HIGHLY RECOMMEND

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!

I find these strips are very accurate, but the colors get strange if you try to use them from one season to the next. We keep them indoors except for the 2 minutes of testing/adjusting and the colors don't fade necessarily, but rather change completely (especially for chlorine levels -- instead of the "new" pink, the ones from last year are brown). The cost is great, so I don't mind replacing each spring. 150 strips is more than enough for the summer even given the large number we use at the start of the season.

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.

I've compared the results from these strips with those from my local pool store's testing services, and they align closely. This consistency gives me confidence in the readings and helps me make informed decisions about chemical adjustments. While some users have reported variations in accuracy, especially with pH readings, my experience has been positive, and the readings have been reliable for maintaining water quality.

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

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.

The strips I received are exactly what I needed to help maintain my pool.