weAQUA Water Hardness Test Kit - DoubleCheck 50 Strips - Hard Water Test Kit – Tests Calcium, Magnesium (0–425 PPM / 0–25 GPG) – for Home & Professional Use, Tap, Pool, Spa, Dishwasher

Absolutely brilliant product. So simple and quick to use. Tested that the plumber had connected outlets correctly. We have various taps, some are fed from the water softener, some not. This enabled us to check that everything was in order. Very clear, easy to see result. Astonished at how well it works. Thank you. And of course quick delivery by Amazon too.

Great bit of kit. Excellent value in my opinion. Bought to check my future whole house filter installation. Checked incoming tap Hard. Checked Brita filtered water Soft. Works 👍

They work as they shouldand are accurate! I turned off my water to my water softener and took a sample after running the water for a couple of minutes and tested the water and it showed it was very hard, I repeated the test with the softener on and after running the tap to clear the hard water - see the results on the photo, so in my opinion thru are very good value for money!

Sort of works - colours are not exactly reg amber green but muddy, less muddy and muddy… need good eyesight. Bought as a one off.

Although a bit expensive but did the job

I wanted to confirm my water softener was doing the job. easy to use and the instructions were simple. results in under a minute.

Item as described and arrived quickly

Seems to work well.

I was curious if my 23 year old water softener was still doing its job well so I dropped $5 on Prime Days for these test strips. I took a sample from an indoor sink (softened) and then from the outside spigot (unsoftened). The strips showed the difference within seconds. Long live my Craftsman water softener circa 2003!

Excelente kit, cumple cabalmente lo descrito, mide la dureza en 2 segundos. Recomiendo ampliamente el producto.

I thought that our water softener wasn't putting out soft water, so I bought these test strips and was pleasantly surprised to see that our water is, indeed, soft. These strips are a good way to keep an ongoing eye on softener performance. Good packaging, too. Five thumbs up!

Easy to use, quick and as described. Good price. Did the job.

Very accurate and easy to use. The test strips confirmed the hardness readings on my water quality meter. The only negative is the short expiration of only 3 months after opening. Wish the test strips were individually wrapped to have a much longer expiration. If the test strips were individually wrapped, I would give it a 5 stars. I tested our outside water from 3 different locations and one from inside the house from the bathroom sink faucet. All outside water tested hard to very hard as expected and inside water tested soft since we have a water softener.