We Use CookiesWe use cookies to enhance the security, performance, functionality and for analytical and promotional activities. By continuing to browse this site you are agreeing to our privacy policy
Hero

Top-10 Water Hardness Test Kits
Loved in the USA

Handpicked for quality & trusted by thousands of customers

Sponsored

Varify 17i
VARIFY

Varify 17in1 Complete Drinking Water Test Kit - 100 Strips + 2 Bacteria Tester Kits - Well, Tap, Home, City Water Testing Strip for Lead, Alkaline, Chlorine, Hardness, Iron, Fluoride, Copper & More

View Deal
#1
Top Rated in the USA
Eagle Ray
MAV AquaDoc

Eagle Ray Digital Water Test Kit for Pool & Spa by AquaDoc with Digital Water Tester and 30 Pool & Hot Tub Test Strips for Chlorine, Bromine, Total Hardness, Cyanuric Acid, Alkalinity and pH

Fast Delivery
10.0
491 reviews

Solid Value from a Trusted Brand

View Deal
1 376 bought in past month

Sponsored

Varify 17i
VARIFY

Varify 17in1 Complete Drinking Water Test Kit - 100 Strips + 2 Bacteria Tester Kits - Well, Tap, Home, City Water Testing Strip for Lead, Alkaline, Chlorine, Hardness, Iron, Fluoride, Copper & More

View Deal
#2
Varify 17i
VARIFY

Varify 17in1 Complete Drinking Water Test Kit - 100 Strips + 2 Bacteria Tester Kits - Well, Tap, Home, City Water Testing Strip for Lead, Alkaline, Chlorine, Hardness, Iron, Fluoride, Copper & More

19%OFF

Fast Delivery
9.7
10 739 reviews

Item still has Pre-Tariff price

View Deal
1 274 bought in past month
Last Purchases
Ale***der
New York, NY
3d ago
El***or
Philadelphia, PA
3d ago
Da***el
Boston, MA
1d ago
#3
Taylor K20
Taylor Technologies, Inc.

Born in the USA

Taylor K2005 High Range Swimming Pool Total and Free Chlorine Bromine Alkalinity Calcium Hardness Base and Acid Demand pH DP Test Kit

Fast Delivery
8.5
3 608 reviews

Solid Value from a Trusted Brand

View Deal
1 172 bought in past month
Quality and price are both spot on.
Lily•San Diego, CA
#4
Bestprod A
bestprod

Bestprod All-New 21 in 1 Drinking Water Testing Kit Strips, Home Tap and Well Water Test Kit for Hardness, Lead, Iron, Copper, Chlorine, Fluoride

10%OFF

Fast Delivery
8.2
3 506 reviews

Item still has Pre-Tariff price

View Deal
1 070 bought in past month
Curated products trusted bytrust us brands
#5
Varify Wat
VARIFY

Varify Water Hardness Test Kit - Water Testing Kit for Home, Drinking, Well, Spa, Swimming Pool, Softener, Dishwasher & More - Hard Water Test Strips for Calcium, Magnesium etc (0-425 pmm, 150 Strips)

23%OFF

Fast Delivery
7.6
7 007 reviews

Item still has Pre-Tariff price

View Deal
968 bought in past month
#6
Hot Tub an
JNW Direct

Hot Tub and Pool Test Strips - 6in1 Quick & Accurate Hot Tub, Spa, Pool Test Strips - 100 Water Test Strips, Water Test Kit with E-Book - Test Chlorine, Bromine, pH, Hardness, Alkalinity - JNW Direct

42%OFF

Fast Delivery
7.6
44 473 reviews

Item still has Pre-Tariff price

View Deal
866 bought in past month
#7
Taylor K-1
Taylor

Taylor K-1005 DPD, 9-in-1 Pool Test Kit for Free & Total Chlorine, Bromine, pH, Base Demand, Alkalinity, Calcium Hardness, Cyanuric Acid Made in The USA, 1 Count

Fast Delivery
7.6
714 reviews

Solid Value from a Trusted Brand

View Deal
764 bought in past month
#8
Watersafe®
Watersafe

Born in the USA

Watersafe® The Original Water Testing Kit for Drinking Water, Well and Tap Water, Sensitive Lead in Water Test, Bacteria, Hardness, pH, Nitrates, Easy Instructions, Lab-Accurate Results, 2 Pack

5%OFF

Fast Delivery
7.3
3 743 reviews

Item still has Pre-Tariff price

View Deal
662 bought in past month
#9
9-in-1 Sma
LKBird

9-in-1 Smart Water Tester with APP Monitoring, Digital Water Test Kit for Turbidity, TDS, EC, Temp, Salt, GH, TOC, COD & UV275, Professional Water Tester for Drinking Water, Well, Tap & Outdoor.

Fast Delivery
7.0
26 reviews

Solid Value from a Trusted Brand

View Deal
560 bought in past month
#10
Water Hard
JNW Direct

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

5%OFF

Fast Delivery
7.0
44 473 reviews

Item still has Pre-Tariff price

View Deal
458 bought in past month

More great picks just for you

Hach Total
Hach Company

Born in the USA

Hach Total Hardness Test Kit, Model 5-B, Drop Count Titration, 145300

Fast Delivery
2 043
verified reviews

Solid Value from a Trusted Brand

View Deal
356 bought in past month
AAwipes 8-
AAwipes

Born in the USA

AAwipes 8-in-1 Aquarium Test Kit (150 Strips) for Freshwater & Saltwater - Quick & Accurate Water Testing for Aquariums & Ponds. Tests Free Chlorine, Hardness, pH, Ammonia Nitrogen, etc. (K02-150)

10%OFF

Fast Delivery
3 125
verified reviews

Item still has Pre-Tariff price

View Deal
254 bought in past month
All-New Po
bestprod

All-New Pool and Spa Test Strips 7 in 1 Quick SuperAccurate Swimming 150 Pool Test Kit - Hot Tub Test Strips & Pool Water Testing Strips for pH Chlorine Bromine Hardness Alkalinity Cyanuric Acid

Fast Delivery
4 429
verified reviews

Solid Value from a Trusted Brand

View Deal
152 bought in past month
Explore other best-rated products in this category
FROG @Ease
FROG

FROG @Ease Test Strips for Hot Tubs and Swim Spas - Test Strip with Out Indicator for FROG @Ease SmartChlor Cartridges, pH, Total Alkalinity and Total Hardness - 30 Test Strips

Fast Delivery
2 380
verified reviews

Solid Value from a Trusted Brand

View Deal
50 bought in past month
AAwipes Aq
AAwipes

Born in the USA

AAwipes Aquarium Ammonia Test Strips 8-in-1 100 Strips Quick & Accurate Water Testing for Freshwater & Saltwater Tanks -Test pH, Sodium Chloride, Alkalinity, Hardness, Chlorine etc. (K02-100)

10%OFF

Fast Delivery
3 128
verified reviews

Item still has Pre-Tariff price

View Deal

FAQ