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20 Best Hard Water Test Kit (2023 Updated)

A water hardness test kit is used to measure the amount of dissolved minerals in water. The most common minerals found in hard water are calcium and magnesium. Hardness is measured in grains per gallon (or GPG) or milligrams per liter (or mg/L).

Water with a hardness of 1 GPG or less is considered soft, while water with a hardness of 10 GPG or more is considered hard.

20 Best Hard Water Test Kit

Product Image Product Name Features Price

API Freshwater GH & KH (Hardness) Test Kit

  • GH & KH (Hardness) Test Kit

ATI ICP-OES Complete Saltwater Water Test Kit

  • Includes Salinity and KH unlike competing test kits
  • Major elements: chloride, sodium, sulphur, magnesium, calcium, potassium, bromine, strontium and boron

Tetra EasyStrips Test Strips Complete Kit 25-Count

  • ALL-IN-ONE TESTING KIT: Everything you need to test your aquarium water.
  • 7 DIFFERENT TESTS WITH 1 STRIP: Just one test monitors ammonia, nitrates, nitrites, water hardness, chlorine, alkalinity and pH levels.

Poolmaster Smart Test 6-Way Pool & Spa Test Strips

  • Number of Pieces: 50
  • Material: Plastic
  • Battery: no battery used

API Freshwater Master Test Kit – 2 oz

  • Api Freshwater Master Test Kit

Pro Lab Total Water Quality Test Kit

  • Bacteria in Water
  • Lead in Water
  • Pesticides in Water

Safe Home Bacteria in Water Test Kit

  • Contains one water quality test vial, which allows you to test for the presence or absence of harmful bacteria in drinking water.

Hach 145300 Total Hardness Test Kit Model 5-B

  • Water hardness is caused almost entirely by calcium and magnesium ions
  • Hardness increases soap consumption
  • Hardness test kits include the inexpensive Models 5-B and 5-EP

PRO-LAB Lead in Water Test Kit, Multicolor

  • Safe and easy to use with EPA approved lab methods
  • Detects poisonous lead in water
  • Standard lab results within 1 week with $40.00 standard lab analysis

Pentair R151276 Water Hardness Test Kit

  • Indicates ppm or in grains
  • CA Prop 65 Warning Label
  • Comes with total hardness in PPM or grains, test vial, 1/2-ounces No. 6, 1-ounce No. 7 and instructions, compact box

Taylor Complete Test Kit – K-2005

  • 3/4 oz

Watersafe Well Water Test Kit

  • Test for copper, iron, and lead
  • Detect dangerous levels of nitrates/nitrites
  • Test for potentially harmful coliform bacteria

Hach 145300 Total Hardness Test Kit, Model 5-B

  • condition: New
  • Brand: Hach Company

Taylor Technologies K-2006 Complete Pool Water Test Kit 81329

  • condition: New
  • Brand: Taylor

SafeDip 6-in-1 Electronic Tester

  • Large Digital LCD Display
  • Measure pH, Free Chlorine, Salt, TDS, ORP and Temperature
  • No Color Matching

Enviro Test Kits Safe Home Water Quality Test Kit

  • The color-coded result helps identify the contaminants in water
  • The water test kit saves your time as it gives instant result

Watersafe WS425W Well Water Test Kit

  • Test for copper, iron, and lead
  • Detect dangerous levels of nitrates/nitrites
  • Test for potentially harmful coliform bacteria

Taylor Pool Water Test Kit Complete K-2006C

  • Includes 2 oz reagent bottles, Simple to use titration drop water testing kit
  • Provides fast and accurate water testing results
API Freshwater GH & KH (Hardness) Test Kit
  • GH & KH (Hardness) Test Kit
ATI ICP-OES Complete Saltwater Water Test Kit
  • Includes Salinity and KH unlike competing test kits
  • Major elements: chloride, sodium, sulphur, magnesium, calcium, potassium, bromine, strontium and boron
Tetra EasyStrips Test Strips Complete Kit 25-Count
  • ALL-IN-ONE TESTING KIT: Everything you need to test your aquarium water.
  • 7 DIFFERENT TESTS WITH 1 STRIP: Just one test monitors ammonia, nitrates, nitrites, water hardness, chlorine, alkalinity and pH levels.
Poolmaster Smart Test 6-Way Pool & Spa Test Strips
  • Number of Pieces: 50
  • Material: Plastic
  • Battery: no battery used
API Freshwater Master Test Kit – 2 oz
  • Api Freshwater Master Test Kit
Pro Lab Total Water Quality Test Kit
  • Bacteria in Water
  • Lead in Water
  • Pesticides in Water
Safe Home Bacteria in Water Test Kit
  • Contains one water quality test vial, which allows you to test for the presence or absence of harmful bacteria in drinking water.
Hach 145300 Total Hardness Test Kit Model 5-B
  • Water hardness is caused almost entirely by calcium and magnesium ions
  • Hardness increases soap consumption
  • Hardness test kits include the inexpensive Models 5-B and 5-EP
PRO-LAB Lead in Water Test Kit, Multicolor
  • Safe and easy to use with EPA approved lab methods
  • Detects poisonous lead in water
  • Standard lab results within 1 week with $40.00 standard lab analysis
Pentair R151276 Water Hardness Test Kit
  • Indicates ppm or in grains
  • CA Prop 65 Warning Label
  • Comes with total hardness in PPM or grains, test vial, 1/2-ounces No. 6, 1-ounce No. 7 and instructions, compact box
Taylor Complete Test Kit – K-2005
  • 3/4 oz
Watersafe Well Water Test Kit
  • Test for copper, iron, and lead
  • Detect dangerous levels of nitrates/nitrites
  • Test for potentially harmful coliform bacteria
Hach 145300 Total Hardness Test Kit, Model 5-B
  • condition: New
  • Brand: Hach Company
Taylor Technologies K-2006 Complete Pool Water Test Kit 81329
  • condition: New
  • Brand: Taylor
SafeDip 6-in-1 Electronic Tester
  • Large Digital LCD Display
  • Measure pH, Free Chlorine, Salt, TDS, ORP and Temperature
  • No Color Matching
Enviro Test Kits Safe Home Water Quality Test Kit
  • The color-coded result helps identify the contaminants in water
  • The water test kit saves your time as it gives instant result
Watersafe WS425W Well Water Test Kit
  • Test for copper, iron, and lead
  • Detect dangerous levels of nitrates/nitrites
  • Test for potentially harmful coliform bacteria
Taylor Pool Water Test Kit Complete K-2006C
  • Includes 2 oz reagent bottles, Simple to use titration drop water testing kit
  • Provides fast and accurate water testing results

1. API Freshwater GH & KH (Hardness) Test Kit

API Freshwater GH & KH (Hardness) Test Kit

  • GH & KH (Hardness) Test Kit

Check Latest Price

Sold By Price
Amazon.com
Walmart
PetSmart
Chewy.com

Product Details

Specifications

Details
Weight 0.3 lb

Reviews From Real Customers

Mike from Daytona
polandsprings00
MamaSays

2. ATI ICP-OES Complete Saltwater Water Test Kit

ATI ICP-OES Complete Saltwater Water Test Kit

  • Includes Salinity and KH unlike competing test kits
  • Major elements: chloride, sodium, sulphur, magnesium, calcium, potassium, bromine, strontium and boron

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
BulkReefSupply.com
SaltwaterAquarium.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Package Dimensions 8.58 x 6.5 x 0.98 inches; 1.55 Ounces
Item Package Dimensions L x W x H 8.58 x 6.5 x 0.98 inches

Reviews From Real Customers

saltwateraquarium.com

3. Tetra EasyStrips Test Strips Complete Kit 25-Count

Tetra EasyStrips Test Strips Complete Kit 25-Count

  • ALL-IN-ONE TESTING KIT: Everything you need to test your aquarium water.
  • 7 DIFFERENT TESTS WITH 1 STRIP: Just one test monitors ammonia, nitrates, nitrites, water hardness, chlorine, alkalinity and pH levels.
  • VERSATILE: Can be used in both freshwater and saltwater aquariums.
  • CONVENIENT: Just dip into water, wait 60 seconds and read results.
  • USAGE: Use weekly to monitor aquarium water, after water changes or when adding new fish.

Check Latest Price

Sold By Price
Amazon.com
eBay
Chewy.com
KV Supply

Product Details

Specifications

Details
Product Dimensions 6 x 4 x 1.13 inches; 0.32 Ounces
Country of Origin USA
Item Package Dimensions L x W x H 5.94 x 3.98 x 1.46 inches
Item Dimensions LxWxH 6 x 4 x 1.13 inches
Target Audience Keyword Fish

Reviews From Real Customers

Garry1248
Kath
Bradbury

4. Poolmaster Smart Test 6-Way Pool & Spa Test Strips

Poolmaster Smart Test 6-Way Pool & Spa Test Strips

  • Number of Pieces: 50
  • Material: Plastic
  • Battery: no battery used

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Manufacturer Warranty yes
Number of Strips 50
Outdoor Living Product Type Pool Test Strips
Pack Size 12
Pool Test Type Test Strips

Reviews From Real Customers

kas
ramus-uw3w4unbl
DanC

5. API Freshwater Master Test Kit – 2 oz

API Freshwater Master Test Kit - 2 oz

  • Api Freshwater Master Test Kit

Check Latest Price

Sold By Price
Amazon.com
Walmart
Chewy.com
PetSmart

Product Details

Specifications

Details
Weight 1.15 lb

Reviews From Real Customers

araceli.c

6. Pro Lab Total Water Quality Test Kit

Pro Lab Total Water Quality Test Kit

  • Bacteria in Water
  • Lead in Water
  • Pesticides in Water
  • Total Alkalinity
  • Total Chlorine

Check Latest Price

Sold By Price
Amazon
Walmart
Home Depot
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 1.75 in
Assembled Height (in) 8 in
Assembled Width (in) 6 in
Assembled Weight (lbs) 0.19 lbs
Packaging Depth 1.75 IN

Reviews From Real Customers

correctfield
sheryy77
prolabtestkits.com

7. Safe Home Bacteria in Water Test Kit

Safe Home Bacteria in Water Test Kit

  • Contains one water quality test vial, which allows you to test for the presence or absence of harmful bacteria in drinking water.
  • Safe and easy to use.
  • Our (DIY) Bacteria Test Vial has the optimum.

Check Latest Price

Sold By Price
Amazon
eBay
Home Depot
Bonanza – titanicmarket’s booth

Product Details

Specifications

Details
Brand Name Enviro Test Kits
Product Type Bacteria in Water Test Kit

Reviews From Real Customers

Aunt B
n li
fldrus0

8. Hach 145300 Total Hardness Test Kit Model 5-B

Hach 145300 Total Hardness Test Kit Model 5-B

  • Water hardness is caused almost entirely by calcium and magnesium ions
  • Hardness increases soap consumption
  • Hardness test kits include the inexpensive Models 5-B and 5-EP

Check Latest Price

Sold By Price
Amazon
eBay
Walmart – DropAir
MechanicSurplus.com

Product Details

Specifications

Details
Country of Origin – Textiles USA
Piece Count 1
System of Measurement EA
Count Per Pack 1
Count 1

Reviews From Real Customers

fixnitup86
FourGirlsDad
euroz28

9. Pro Lab TW120 Total Water Quality Kit

Pro Lab TW120 Total Water Quality Kit

Check Latest Price

Sold By Price
Amazon
eBay
Sears – zabiva
MechanicSurplus.com

Product Details

10. PRO-LAB Lead in Water Test Kit, Multicolor

PRO-LAB Lead in Water Test Kit, Multicolor

  • Safe and easy to use with EPA approved lab methods
  • Detects poisonous lead in water
  • Standard lab results within 1 week with $40.00 standard lab analysis
  • Express service available for real estate transactions
  • Prepaid postage included

Check Latest Price

Sold By Price
Amazon
eBay
Home Depot
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 0.75 in
Assembled Height (in) 8 in
Assembled Width (in) 6 in
Assembled Weight (lbs) 0.16 lbs
Packaging Depth 1.25 IN

Reviews From Real Customers

lingats
JeffP
applecrispy

11. Pentair R151276 Water Hardness Test Kit

Pentair R151276 Water Hardness Test Kit

  • Indicates ppm or in grains
  • CA Prop 65 Warning Label
  • Comes with total hardness in PPM or grains, test vial, 1/2-ounces No. 6, 1-ounce No. 7 and instructions, compact box
  • Measures 5-1/2-inch length by 13-3/4-inch height by 11-1/2-inch width

Check Latest Price

Sold By Price
Amazon
eBay – positivepoolwholesale
Pool Warehouse
Aqua Supercenter

Product Details

Specifications

Details
Weight 7.37 lb

Reviews From Real Customers

stphngntnbn2608
22skip22
604canyonwood

12. Taylor Complete Test Kit – K-2005

Taylor Complete Test Kit - K-2005

  • 3/4 oz

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Sold By Price
Amazon
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Weight 16.01 lb

Reviews From Real Customers

discovermystore.com
Danno
Lisa L.

13. Watersafe Well Water Test Kit

Watersafe Well Water Test Kit

  • Test for copper, iron, and lead
  • Detect dangerous levels of nitrates/nitrites
  • Test for potentially harmful coliform bacteria
  • Learn your water’s pH balance
  • Determine your waters’ hardness

Check Latest Price

Sold By Price
Amazon
Walmart – Filters Fast LLC
FiltersFast.com

Product Details

Specifications

Details
Copper – causes liver and kidney damage in infants
Water Hardness – causes lime scale and higher detergent use
Nitrite Below 1.0 ppm
Total Nitrate/Nitrite Below 10.0 ppm
Total Chlorine Below 4 ppm

Reviews From Real Customers

thailandunique
fatima242411
BrianWHODAT

14. Hach 145300 Total Hardness Test Kit, Model 5-B

Hach 145300 Total Hardness Test Kit, Model 5-B

  • condition: New
  • Brand: Hach Company

Check Latest Price

Sold By Price
Amazon
Hach – US
Cole-Parmer
Kleen-Rite Corp

Product Details

Reviews From Real Customers

imhotep108

15. Taylor Technologies K-2006 Complete Pool Water Test Kit 81329

Taylor Technologies K-2006 Complete Pool Water Test Kit 81329

  • condition: New
  • Brand: Taylor

Check Latest Price

Sold By Price
Amazon
eBay – intheswimpoolsupplies
Walmart – In The Swim
Leslie’s Pool Supplies

Product Details

Specifications

Details
Assembled Product Weight 2.2500 lb
Assembled Product Dimensions (L x W x H) 9.00 x 5.00 x 4.00 Inches

Reviews From Real Customers

shannon.l
K.Rai
TM

16. SafeDip 6-in-1 Electronic Tester

SafeDip 6-in-1 Electronic Tester

  • Large Digital LCD Display
  • Measure pH, Free Chlorine, Salt, TDS, ORP and Temperature
  • No Color Matching
  • Built-in Water Sample Cup

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Weight 31.99 lb

Reviews From Real Customers

happycamper
nosebraid
alanburton

17. Enviro Test Kits Safe Home Water Quality Test Kit

Enviro Test Kits Safe Home Water Quality Test Kit

  • The color-coded result helps identify the contaminants in water
  • The water test kit saves your time as it gives instant result
  • Simple test process makes it more user-friendly

Check Latest Price

Sold By Price
Amazon
eBay – momboss13

Product Details

Specifications

Details
Product Type Water Test Kit
Purpose Water quality test
Length 6″
Width 6″
Depth 1.5″

Reviews From Real Customers

Kyle O

18. Pentair R151276 1200 Total Water Hardness Test Kit

Pentair R151276 1200 Total Water Hardness Test Kit

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Sold By Price
Amazon
Walmart – Yyhtop Group Inc

Product Details

Reviews From Real Customers

Jamesp
jeffhorrocks

19. Watersafe WS425W Well Water Test Kit

Watersafe WS425W Well Water Test Kit

  • Test for copper, iron, and lead
  • Detect dangerous levels of nitrates/nitrites
  • Test for potentially harmful coliform bacteria
  • Learn your water’s pH balance
  • Determine your waters’ hardness

Check Latest Price

Sold By Price
Amazon
Cole-Parmer
Neobits.com

Product Details

Specifications

Details
Product Genre/Category Kitchen

Reviews From Real Customers

FISS
mthomas4

20. Taylor Pool Water Test Kit Complete K-2006C

Taylor Pool Water Test Kit Complete K-2006C

  • Includes 2 oz reagent bottles, Simple to use titration drop water testing kit
  • Provides fast and accurate water testing results
  • Tests for: Free and Total Chlorine, Bromine, pH, Acid and Base Demand, Calcium Hardness, Total Alkalinity and Stabilizer levels
  • Important to ensure you aren’t overtreating your pool

Check Latest Price

Sold By Price
Amazon
Poolweb.com
shop.com
Wild West Pool Supplies

Product Details

Specifications

Details
Product Dimensions 27 x 18 x 12 inches
Is Discontinued By Manufacturer No

Reviews From Real Customers

at.beach
barbamom
cherryville_deal

Conclusion

The conclusion of the hard water test kit is that your water is hard. This means that it contains a high level of minerals, which can be a problem for some appliances and plumbing.

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