GENERAL/CARBONATE HARDNESS KIT

4.6 stars out of 8 reviews

(4.6)|

Key item features

1.Contains one (1) API GH & KH TEST KIT Freshwater Aquarium Water Test Kit, including 2 bottles of testing solution, 1 color card and 2 glass test tubes with cap2.Helps monitor water quality and prevent invisible water problems that can be harmful to fish and plants and cause fish loss3.Accurately measures GH & KH in freshwater aquariums4.Water hardness is a measure of the dissolved mineral content of water and should match fish natural habitat to prevent fish stress and keep them healthy5.Use for weekly monitoring and when water or fish problems appear

Specs

Features
Accurate
Model
58
Manufacturer
Mars Fishcare
Retail packaging
Kit

Current price is $12.77

Price when purchased online

Free 90-day returns

How do you want your item?

I want delivery savings with

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.

How do you want your item?

Columbus, 43215

Arrives by Tomorrow

Order within 4 hr 23 min

Sold by Kwik Retail

Fulfilled by Walmart

4.491244411326378 stars out of 5, based on 5373 seller reviews(4.5)

Report an issue with this seller

Free 90-day returns - in store or online

Other sellers

$11.84

+Free shipping

Shipping, arrives by Wed, Mar 25 to Columbus, 43215

Sold and shipped by Kens Fish Inc.

Free 30-day returns

Get free delivery, shipping and more*

*Restrictions apply

Continue your search on Walmart

water test kit for aquarium

kh gh test kit

api test masters kits for freshwater

kh fish

aquarium test kits

Similar items you might like

Based on what customers bought

API Freshwater Master Test Kit, Aquarium Water 850 Test Kit $38.63
current price $38.63
API Freshwater Master Test Kit, Aquarium Water 850 Test Kit
4.8 out of 5 Stars. 117 reviews
API Nitrite Test Kit, Freshwater and Saltwater Aquarium Test Kit, 180 Tests $12.99
current price $12.99
API Nitrite Test Kit, Freshwater and Saltwater Aquarium Test Kit, 180 Tests
4.5 out of 5 Stars. 2 reviews
Best seller Tetra 5-in-1 EasyStrips Accurate Aquarium Test Kit, for Freshwater and Saltwater, 25 Count $13.24 53.0 ¢/count
Best seller
Available in additional 4 options
current price $13.24
53.0 ¢/count
Tetra 5-in-1 EasyStrips Accurate Aquarium Test Kit, for Freshwater and Saltwater, 25 Count
4.6 out of 5 Stars. 167 reviews
API GH & KH TEST KIT Freshwater Aquarium Water Test Kit $21.45
current price $21.45
API GH & KH TEST KIT Freshwater Aquarium Water Test Kit
4.7 out of 5 Stars. null reviews
SEAOURA 9-in-1 Aquarium Test Kit - 65 Strips for Fish Tanks & Ponds, Tests pH, Nitrate, Nitrite, Chlorine, Hardness, Alkalinity, Iron, Copper, Carbonate - Accurate & Fast Water Testing Strips $9.89 Was $10.99
Available in additional 2 options
current price $9.89, Was $10.99
SEAOURA 9-in-1 Aquarium Test Kit - 65 Strips for Fish Tanks & Ponds, Tests pH, Nitrate, Nitrite, Chlorine, Hardness, Alkalinity, Iron, Copper, Carbonate - Accurate & Fast Water Testing Strips
4 out of 5 Stars. 1 reviews
FRESHWATER PH TEST KIT $10.00
current price $10.00
FRESHWATER PH TEST KIT
4.4 out of 5 Stars. 17 reviews
API Nitrate Test Kit Fresh & Salt Water $15.54
current price $15.54
API Nitrate Test Kit Fresh & Salt Water
4.5 out of 5 Stars. 10 reviews
API Replacement Test Tubes $30.00
current price $30.00
API Replacement Test Tubes
3 out of 5 Stars. 13 reviews
API 5 in 1 Aquarium Test Strips with - 4 Strips $11.80 $2.95/ea
current price $11.80
$2.95/ea
API 5 in 1 Aquarium Test Strips with - 4 Strips
4.7 out of 5 Stars. 3 reviews
Tetra EasyStrips 25 Count, Complete Aquarium Test Strips, Water Testing $9.99 40.0 ¢/count
current price $9.99
40.0 ¢/count
Tetra EasyStrips 25 Count, Complete Aquarium Test Strips, Water Testing
3.6 out of 5 Stars. 17 reviews
API Copper Test Kit, Aquarium Water Test Kit, 1-Count $12.48
current price $12.48
API Copper Test Kit, Aquarium Water Test Kit, 1-Count
50pcs Ammonia Nitrogen Quick Water Quality Test Paper Kit for Aquarium Smile Home $10.45
current price $10.45
50pcs Ammonia Nitrogen Quick Water Quality Test Paper Kit for Aquarium Smile Home
100Pcs Aquarium Test Strips 7 in 1 Fish Tank Test Kit Freshwater Saltwater Aquarium Water pH Test Strips Kit for Total Hardness Nitrate Nitrite Free Chlorine Carbonate pH Value Total Alkali $8.84
current price $8.84
100Pcs Aquarium Test Strips 7 in 1 Fish Tank Test Kit Freshwater Saltwater Aquarium Water pH Test Strips Kit for Total Hardness Nitrate Nitrite Free Chlorine Carbonate pH Value Total Alkali
50 Pcs Aquarium Ammonia Nitrogen Test Strips Quick Water Quality Testing Kit for Home Fish Tanks Breeding Farms Fangkenuo $7.27
current price $7.27
50 Pcs Aquarium Ammonia Nitrogen Test Strips Quick Water Quality Testing Kit for Home Fish Tanks Breeding Farms Fangkenuo
API 5-IN-1 TEST STRIPS Freshwater and Saltwater Aquarium Test Strips 4-Count Box $18.49
current price $18.49
API 5-IN-1 TEST STRIPS Freshwater and Saltwater Aquarium Test Strips 4-Count Box
2Pcs Aquarium Test Strip Kit Precise Fish Tank Water Testing Kit Aquarium Water Quality Test Kit for Nitrite/Nitrate/Free Residual Oxygen/Total Alkalinity/Carbonate/pH/Total Hardness $14.49
current price $14.49
2Pcs Aquarium Test Strip Kit Precise Fish Tank Water Testing Kit Aquarium Water Quality Test Kit for Nitrite/Nitrate/Free Residual Oxygen/Total Alkalinity/Carbonate/pH/Total Hardness
FW/SW PHOSPHATE TEST KIT $14.99
current price $14.99
FW/SW PHOSPHATE TEST KIT
2.3 out of 5 Stars. 3 reviews
100Pcs 7 In 1 Aquarium Fish Tank Water Tropical Test Strips Kit $12.47
current price $12.47
100Pcs 7 In 1 Aquarium Fish Tank Water Tropical Test Strips Kit
80 - Strip PH Tester Kit for Aquarium Water Quality Monitoring $5.39
current price $5.39
80 - Strip PH Tester Kit for Aquarium Water Quality Monitoring
6-In-1 Multi-Functional Aquarium Test Strips Aquarium Test Kit, 6-In-1 Aquarium Water Testing Strips For Ph Nitrite Nitrate General & Carbonate Hardness, 50/100 Count High $6.79
current price $6.79
6-In-1 Multi-Functional Aquarium Test Strips Aquarium Test Kit, 6-In-1 Aquarium Water Testing Strips For Ph Nitrite Nitrate General & Carbonate Hardness, 50/100 Count High

About this item

Product details

API GH & KH TEST KIT Freshwater Aquarium Water Test Kit

info:

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Features

Accurate

Brand

API

Accessories

KH test bottle, GH test bottle, instructions and two capped test tubes

Instructions

Use for weekly monitoring and when water or fish problems appear

Directions

Instructions

Use for weekly monitoring and when water or fish problems appear

Warranty

Warranty information

All products come with a 90 Day, or longer, manufacturer warranty

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warnings

Warning Text

proposition 65 reasons:WARNING: This product can expose you to chemicals including beta-Myrcene, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

WARNING: WARNING: This product can expose you to chemicals including beta-Myrcene, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

Customer ratings & reviews

4.6 out of 5 stars

stars8 ratings5 reviews

How item rating is calculated

Customer photos

Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.

Sort by |

Showing 1-3 of 5 reviews

Mar 5, 2026

Jesse

Item details

Size: GH & KH Test Kit

Sold byAbit ProductsDelivered byWalmart

5 out of 5 stars review

Verified Purchase

Stabilize

It gives you a peace of mind when you do the test, which works awesome to find out. What do you need to stabilize your water tank.

Helpful?

Feb 15, 2025

robert

Item details

Size: GH & KH Test Kit

Sold and shipped byKens Fish Inc.

5 out of 5 stars review

Verified Purchase

Brewing water testing

I use this for testing the general and carbonate hardness of brewing water. It works perfectly for that with fast, accurate results. The kit also has a expiration date on it which is important as the testing chemicals stop working over time. The results are in German degrees, but there is an attached chart in the instructions which converts them to ppm.

Helpful?

Oct 6, 2023

Walmart customer

Item details

Size: GH & KH Test Kit

Sold byPond and Pet Direct

5 out of 5 stars review

Verified Purchase

Excelente choice

Fast delivery and recommended to know how much hardness is your water

Incentivized Review

Helpful?

Rewards debit card.Earn 3% cash back, on up to $150spent each month.Terms apply.

Join OnePay Cash

Rollbacks & more

Easter

Grocery

Clothing, Shoes, & Accessories

Baby & Kids

Pharmacy, Health & Wellness

Home, Garden & Tools

Electronics

Gaming

Auto & Tires

Personal Care

Beauty

Toys & Outdoor Play

Household Essentials

Pet Supplies

School, Office & Art Supplies

Sports & Outdoors

Books, Movies, & Music

Party Supplies

Auto Care Services

Pharmacy

Health Services

Vaccines

Vision Center

Benefit Programs

Insurance Services

Lists

Registries

Gift Cards

Spark Good

Custom Cakes

Custom Cupcakes

Featured

Photo Gifts

OnePay Hub

Money & Other Services

Gift Cards

Protection Services

Home & Tech Services

Subscriptions

Subscription Products

Walmart Business

Industry solutions

It’s easier in the app

Pickup & Delivery

Get inspired

GENERAL/CARBONATE HARDNESS KIT

Key item features

Specs

How do you want your item?

Get free delivery, shipping and more*

Continue your search on Walmart

Similar items you might like

Based on what customers bought

API Freshwater Master Test Kit, Aquarium Water 850 Test Kit $38.63

API Freshwater Master Test Kit, Aquarium Water 850 Test Kit

API Nitrite Test Kit, Freshwater and Saltwater Aquarium Test Kit, 180 Tests $12.99

API Nitrite Test Kit, Freshwater and Saltwater Aquarium Test Kit, 180 Tests

Best seller Tetra 5-in-1 EasyStrips Accurate Aquarium Test Kit, for Freshwater and Saltwater, 25 Count $13.24 53.0 ¢/count

Tetra 5-in-1 EasyStrips Accurate Aquarium Test Kit, for Freshwater and Saltwater, 25 Count

API GH & KH TEST KIT Freshwater Aquarium Water Test Kit $21.45

API GH & KH TEST KIT Freshwater Aquarium Water Test Kit

SEAOURA 9-in-1 Aquarium Test Kit - 65 Strips for Fish Tanks & Ponds, Tests pH, Nitrate, Nitrite, Chlorine, Hardness, Alkalinity, Iron, Copper, Carbonate - Accurate & Fast Water Testing Strips $9.89 Was $10.99

SEAOURA 9-in-1 Aquarium Test Kit - 65 Strips for Fish Tanks & Ponds, Tests pH, Nitrate, Nitrite, Chlorine, Hardness, Alkalinity, Iron, Copper, Carbonate - Accurate & Fast Water Testing Strips

FRESHWATER PH TEST KIT $10.00

FRESHWATER PH TEST KIT

API Nitrate Test Kit Fresh & Salt Water $15.54

API Nitrate Test Kit Fresh & Salt Water

API Replacement Test Tubes $30.00

API Replacement Test Tubes

API 5 in 1 Aquarium Test Strips with - 4 Strips $11.80 $2.95/ea

API 5 in 1 Aquarium Test Strips with - 4 Strips

Tetra EasyStrips 25 Count, Complete Aquarium Test Strips, Water Testing $9.99 40.0 ¢/count

Tetra EasyStrips 25 Count, Complete Aquarium Test Strips, Water Testing

API Copper Test Kit, Aquarium Water Test Kit, 1-Count $12.48

API Copper Test Kit, Aquarium Water Test Kit, 1-Count

50pcs Ammonia Nitrogen Quick Water Quality Test Paper Kit for Aquarium Smile Home $10.45

50pcs Ammonia Nitrogen Quick Water Quality Test Paper Kit for Aquarium Smile Home

100Pcs Aquarium Test Strips 7 in 1 Fish Tank Test Kit Freshwater Saltwater Aquarium Water pH Test Strips Kit for Total Hardness Nitrate Nitrite Free Chlorine Carbonate pH Value Total Alkali $8.84

100Pcs Aquarium Test Strips 7 in 1 Fish Tank Test Kit Freshwater Saltwater Aquarium Water pH Test Strips Kit for Total Hardness Nitrate Nitrite Free Chlorine Carbonate pH Value Total Alkali