Regular water testing is essential in order to keep your fish healthy and thriving. By checking the ammonia, pH, nitrite and nitrate levels in your [fish aquarium](https://www.chewy.com/b/aquariums-starter-kits-1735), you can ensure that the water condition is always ideal. It's especially crucial to check these levels during water changes and when setting up a new tank. You can do this easily with one of our aquarium test kits from top brands like [API](https://www.chewy.com/f/api_f1v469808) and [Tetra](https://www.chewy.com/f/tetra_f1v286972). Get professional results with [API Freshwater Aquarium Master Test Kit](https://www.chewy.com/api-freshwater-aquarium-master-test/dp/121954). This aquarium water test kit measures and repairs the aquarium levels that are necessary to the health of your freshwater tank. Fish require balanced levels of ammonia, pH, high-range pH, nitrate and nitrite in order to stay healthy and thrive. These levels can change pretty quickly as fish waste and uneaten food or other organic matter builds up or when untreated tap water is added to the tank. This fish tank test kit comes with everything you need to stay on top of aquarium levels. It tests tap and aquarium water and protects fish from toxic water conditions. And it comes with a calibrated color card that you can hold up next to the water tubes to compare your results. If you have a saltwater aquarium, you should opt for a saltwater test kit like the [API Saltwater Aquarium Master Test Kit](https://www.chewy.com/api-saltwater-aquarium-master-test/dp/122075). It comes with everything you need to accurately measure the four saltwater parameters in your tank, including six bottles of liquid test reagent, four glass test tubes with snap-tight caps, and a holding tray. There's also a step-by-step instruction booklet with information to walk you through the process. You could also try [Tetra Easy Strips 6-in-1 Freshwater & Saltwater Aquarium Test Strips](https://www.chewy.com/tetra-easystrips-6-in-1-freshwater/dp/125667). These convenient strips work for fresh or saltwater aquariums. All you have to do is dip and read the results, then treat the water accordingly. Proper maintenance, upkeep and regular testing will help keep your aquarium water in tip-top condition. And a freshwater test kit makes it super easy to keep your water clean. Shop for [fish food](https://www.chewy.com/b/food-treats-886), [fish tank filters](https://www.chewy.com/b/filters-925), [fish tank décor](https://www.chewy.com/b/decor-accessories-1737) and any other [fish products](https://www.chewy.com/b/fish-885) you may need here at Chewy's [online pet store](https://www.chewy.com/)!

Related Categories: [Fish Algaecides and Water Clarity](https://www.chewy.com/b/algaecides-water-clarity-907), [Fish pH Treatments](https://www.chewy.com/b/ph-treatments-908), [Aquarium Plant Care](https://www.chewy.com/b/plant-care-909), [Fish Salt and Minerals](https://www.chewy.com/b/salt-minerals-910), [Fish Water Conditioners](https://www.chewy.com/b/water-conditioners-911), [Fish Water Care](https://www.chewy.com/b/water-care-906)

Shop Chewy for low prices on the best fish tank and aquarium water test kits. Chewy has a wide variety of both freshwater and saltwater aquarium water test kits from top brands. *FREE* shipping on orders $49+ and the BEST customer service!

Fish Tank & Aquarium Water Test Kits: Low Prices (Free Shipping) | Chewy

Aquarium test kits are usually accurate enough for good fishkeeping, but they can range in accuracy depending on which kit you choose. Aquarium water tests that come with testing solutions and test tubes are less accurate than scientific-grade fish tank water testers, but far more reliable than basic aquarium test strips. You can find fish tank water test kits that test for various water parameters, including ammonia, pH and nitrate and nitrite levels.

You should test your aquarium water weekly as a regular practice and more often if you suspect there's a problem. Test your water anytime you make a big change like adding lots of water or introducing new fish or plants. Some experts recommend testing the water every few days when you first set up your tank, just to be sure the water parameters are properly in balance.

How often should I test my aquarium water?

The best aquarium water test kits are master kits designed for the type of tank you have. These usually contain separate testing materials for ammonia, nitrate and nitrite levels as well as pH. You may want to supplement your water testing kit arsenal with additional tests for hardness, alkalinity, phosphates and copper, depending on specific needs of your fish. Most experts recommend against relying on aquarium water test strips for regular testing, but they can be helpful as a supplemental testing method.

What are the best aquarium water test kits?

Regular water testing is essential in order to keep your fish healthy and thriving. By checking the ammonia, pH, nitrite and nitrate levels in your aquarium, you can ensure that the water condition is always ideal. It’s especially crucial to check these levels during water changes and when setting up a new tank. You can do this easily with one of our aquarium test kits.
Get professional results with API Freshwater Aquarium Master Test Kit. This aquarium water test kit measures and repairs the aquarium levels that are necessary to the health of your freshwater tank. Fish require balanced levels of ammonia, pH, high-range pH, nitrate and nitrite in order to stay healthy and thrive. These levels can change pretty quickly as fish waste and uneaten food or other organic matter builds up or when untreated tap water is added to the tank. This fish tank test kit comes with everything you need to stay on top of aquarium levels. It tests tap and aquarium water and protects fish from toxic water conditions. And it comes with a calibrated color card that you can hold up next to the water tubes to compare your results.
If you have a saltwater aquarium, you should opt for a saltwater fish tank kit like the API Saltwater Aquarium Master Test Kit. It comes with everything you need to accurately measure the four saltwater parameters in your tank, including six bottles of liquid test reagent, four glass test tubes with snap-tight caps, and a holding tray. There’s also a step-by-step instruction booklet with information to walk you through the process. You could also try Tetra Easy Strips 6-in-1 Freshwater & Saltwater Aquarium Test Strips. These convenient strips work for fresh or saltwater aquariums. All you have to do is dip and read the results, then treat the water accordingly. 

Proper maintenance, upkeep and regular testing will help keep your aquarium water in tip-top condition. And an aquarium test kit makes it super easy. Shop the best aquarium tests kits here on Chewy today!

Water Test Kits

True

Autoship & Save Eligible

Saltwater

Freshwater

Pond

Aquarium Type

Instant Ocean

Lifegard Aquatics

Nyos

Salifert

Tetra

Brand

Tropical Freshwater

Marine Invertebrate

Goldfish

Marine Fish

Cichlid

Koi & Pond Fish

Betta

Bottom Feeder

Discus

Fish Type

[0,9.99]

[10,19.99]

[20,29.99]

[30,39.99]

[40,49.99]

[50,*]

Price

[4,5]

[3,5]

[2,5]

[1,5]

Customer Rating

Nyos Nitrate Reefer Aquarium Test Kit

D-D H2 Ocean Salinity Refractometer

Lifegard Aquatics All Purpose 6-Way Fish Pond Test Strip Kit, 25 count

Lifegard Aquatics All Purpose 5-Way Fish Pond Test Strips, 25 count

ASF SeaTest NH3 (Ammonia-Ammonium) Fish Aquarium Water Test Kit, 40 count

API Marine Saltwater Master Test Aquarium Kit

Salifert Aquarium Potassium Test Kit

ASF SeaTest Ca2+ (Calcium) Fish Aquarium Water Test Kit, 40 count

Nyos Calcium Reefer High Sensitivity Seawater Calcium Test Kit

Nyos Magnesium Reefer Aquarium Test Kit

ASF SeaTest Mg2+ (Magnesium) Fish Aquarium Water Test Kit, 40 count

Lifegard Aquatics Fish Pond Ammonia Test Strips, 25 count

ASF SEATEST GH (Total Hardness) Fish Aquarium Water Test Kit, 40 count

ASF SeaTest NO2- (Nitrite) Fish Aquarium Water Test Kit, 100 count

ASF SeaTest NO3- (Nitrate) Fish Aquarium Water Test Kit, 40 count

ASF SeaTest PO4- (Phosphate) Fish Aquarium Water Test Kit, 40 count

ASF SeaTest pH Fish Aquarium Water Test Kit, 100 count

ATI Professional ICP-OES Water Analysis

Salifert Aquarium Oxygen Test Kit

Aquarium Water Test Kits & Strips

Aquarium Type

Brand

Fish Type

Price

Customer Rating