We use it as a general hardness tester and it works well. You get plenty of paper and since it's on a roll, it's far more affordable than individual test strips. The narrow scale is 0-20 with 5gpg increments, and the wide scale has 10gpg increments. If you're trying to dial-in a filtration setup for to hit a target hardness, you may want a digital tester, but for general kitchen jobs, this is perfect.
Hydrion Water Hardness Test Kit
Item number 373wht050
Product Overview
- (2) 15-ft. test rolls included
- (1) roll measures 0-20 grains per gallon for hard water; (1) roll measures 10-50 grains per gallon
- Easy-to-read color chart, immediate results
- Quantity
- 1/Each
- Shipping Weight
- 0.09 lb.
- Length
- 30 Feet
- Features
- Made in America
- Package Size
- 2 Rolls
- Test Level
- 50 Grains per Gallon
- Type
- Water Test Strips
Details
Eliminate the need for expensive lab equipment with this Hydrion water hardness test kit! Thanks to this easy-to-use kit, there is no need for technically trained personnel to measure water hardness. Simply tear off a strip of test paper, immerse in water for five seconds, then instantly compare the resulting color with the color chart. The paper is held in a convenient, plastic dispensing container.
This kit contains 2 rolls of test papers and 2 specially calibrated color charts. One roll measures between 0-20 grains per gallon of calcium carbonate. The second roll measures from 10-50 grains per gallon. The color chart has color matches at 0, 5, 10, and 20 grains per gallon. A reading of 5 grains per gallon indicates moderately hard water. The second roll of test paper has color chart matches at 10, 20, 30, and 50 grains per gallon and is used for testing known hard water sources.
Each kit contains (2) 15-foot rolls of test paper and matching color charts. These test strips should not be stored in an area with high humidity or in an area where they may be exposed to water before use.

Made in America
This item was made in the United States of America.
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Customer Reviews
Customer Photos & Videos
Customers Say
Customers appreciate this water hardness test kit for its ease of use, accuracy, and affordability. It's valued for general kitchen tasks, ensuring the proper functioning of dishwashers and espresso machines, and verifying water filtration systems. The test paper, provided on a roll for economical use, supports frequent testing needs.
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This AI-generated summary was created from real customer reviews
Customer Photos & Videos
Amazing product. Easy to use and cheap to buy this test kit will give you accurate readings in seconds. Could not ask for a better testing kit.
I use this to make sure my dishwasher works properly. If you have a Miele or other European dishwasher, you may not realize you can program it to the water hardness in your house/business. Once I figured out how to translate the units from this test kit to the units on my dishwasher, it was easy to use and I've programmed it properly. It tells me when I need dishwasher salt.
This product helps us to keep track of our water hardness. It is important when you own an espresso machine to keep the water soft so you dont have build up and problems with your machine
It is convenient to have this water hardness test kit handy to test your water as needed. The test paper is easy to use and accurate.
This Test Kit is great!!. Several months ago, I was looking for a water hardness test equipment for my kitchen lab. We were installing some filters and wanted to know if they were working properly. I saw this test kit and bought it to see if it worked. It worked perfectly and is very cheap for what it does. Each roll last for about 500 uses. Great product, easy to use and easy to storage.