API 5 in 1 Freshwater & Saltwater Aquarium Test Strips, 25 count - Chewy.com

API 5 in 1 Freshwater & Saltwater Aquarium Test Strips

Rated 3.9737 out of 5 stars

$12.98Chewy Price
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About This Item


  • Tests five key water parameters—pH, nitrite, nitrate, carbonate and general hardness.
  • Highly accurate color charts provide precise test results, identifying problems in your aquarium.
  • Chart colors are distinctive, making test results easy to read.
  • Recommendations help troubleshoot aquarium issues.
  • Superior moisture protection packaging ensures testing accuracy.

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Play Video: Learn More About API From Our Team of Experts
Learn More About API From Our Team of Experts

Help lower your aquarium's pH level with API's pH Down or raise it with API's pH Up water treatment.

About API Testing

Testing the Waters

For fish to thrive, their aquarium water must be similar to the water in their natural environment. Poor water quality can cause stress, illness and even the loss of your fish. Important water quality parameters include ammonia, nitrite, nitrate, and pH. These can vary over time, and they are invisible to the eye, which is why it is necessary to test weekly. Choose from a wide range of API testing options like the Freshwater Master Test Kit or 5-in-1 Test Strips to accurately evaluate your water.

Pressed for Time? Just Dip and Read

Simply dip an API test strip into your aquarium, swirl it twice, and then use the color-coded chart to determine if your water is within safe parameters or if adjustments are needed. That’s it! API test strips are available in a 5-in-1 version, which includes testing for pH, nitrite, nitrate, carbonate, and general hardness. Ammonia and pH test strips are also available so you can mix and match according to your needs.

The Scientific Approach

Get professional results from the comfort of your home with API test kits. Measure up to six parameters with API Master Test Kits, or pick and choose from a wide variety of individual test kits. Both types of kits come with test tubes and a laminated, calibrated color card. API test kits allow for numerous tests, making them an inexpensive way to help keep your aquarium water quality in check.

How to Correct Aquarium Water Parameters

Too Much Ammonia?

Ammonia is released into the water through gills, urine, uneaten food and more. API Ammo-Lock detoxifies it instantly.

Inappropriate pH Levels?

Fish require a specific pH level to thrive. Use API pH Down to lower freshwater aquarium water pH to the right level.

Too Much Nitrite?

Use API Quick Start to quickly consume nitrite and help maintain an active biological filter.

Nitrates Too High?

API Nitra-Zorb helps remove nitrate and other toxins that can be harmful to fish and lead to algae growth.

About API

The team at API has a passion for fish and understands the rewards and relaxation fishkeeping can bring. For almost 60 years, they have developed premium products with a focus on proven and effective results. API offers a range of testing kits, water conditioners and nutritionally superior fish foods. They are dedicated to making a better underwater world for the benefit of fish and those who keep them.

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Fish TypeTropical Freshwater, Marine Fish, Betta...Tropical Freshwater, Betta, Cichlid, Goldfish, Marine FishTropical Freshwater, Marine FishTropical Freshwater, Marine FishTropical Freshwater, Marine Fish, Betta...
Aquarium TypeFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, Saltwater

Questions & Answers

2 Customer Questions

Does it test for Ammonia?
Answer by ChewyJan 26, 2021
The 5 in 1 Test strips test for: Nitrate, Nitrite, pH, General Hardness and Carbonate Hardness. They do not test for ammonia.

does it test for salt level
Answer by ChewyDec 17, 2019
These aquarium test strips test for five key water parameters—pH, nitrite, nitrate, carbonate and general hardness.

ReviewsWrite a Review

Rated 3.9737 out of 5 stars
38 Reviews
Would recommend to a friend

38 Customer Reviews

Filter by reviews that mention

Rated 5 out of 5 stars
By jdr3366 on May 25, 2022


The price is right and the test strips measure what I need to know, minus NH4. But no kits do that. Strips are criticized because they are less accurate, but I look for consistency in values and trends. Once the aquarium is cycles, that's what you need, IMO. The chart is readable.

Rated 5 out of 5 stars
By Mojo on Apr 4, 2022

Chewy purchase

Test kit arrived on time with my other purchases. This is a tough one because I have no way to check the voracity of test results, but it works just as advertised.

Rated 2 out of 5 stars
By Tony on Aug 21, 2021

Not sure there wirth it

Easy to use but they don't check ammonia levels and there nitrite and nitrate readings are way off from the regular Api liquid test. Use with caution they do not give reliable readings. The Gh readings were a nice find but they maybe off as well

Rated 3 out of 5 stars
By Neesie on Jul 31, 2021

Aquarium Test Kit Review

The kit worked fine but is not like the kits I usually use. This kit, you need to look up the normal range results to see where your test results lie. The ranges are shown in the pamphlet included with the kit. On the kits I usually use, they show the normal range right on the gauge. It is so much easier.

Rated 3 out of 5 stars
By JackofAll on May 22, 2021

Bit confusing

The instructions say immediately check the first 3 indicators but to wait 30 seconds to read the 4th & 5th/nitrite and nitrate levels. I bought these to test my nitrates specifically but the reading continues to change (get darker) after the 30 seconds. So what's the correct level; the reading at exactly 30 seconds (could be 40 to 80) or the color it ends up at (as high as 160)?

Rated 4 out of 5 stars
By Cheyenne on Jun 18, 2021

Works 90% of the time

These strips are decent for in between using a full drop test kit like the API Freshwater Master Test Kit. I do find about 10% of the strips I used had issues with the pH portion not developing properly, thus not being able to read the results.

Rated 1 out of 5 stars
By Cristian on Jun 21, 2021

master test kit is better

The product said I had high nitrite in my 65 gallon aquarium and then I was worried so I ended up buying a API master test kit and I had no nitrite, I couldn’t believe how bad of a product and waste of money this was.

Rated 4 out of 5 stars
By kyrahill on Feb 28, 2021

Good Product, to an Extent

While these dip sticks come in handy, it’s important to use a fresh water master test kit to get PRECISE values and read your water for ammonia (since these DON’T test for ammonia). These are handy for in-between precise water tests, but not as the only source of water testing, because they aren’t incredibly accurate. I attached a pic of their master test kit that i use, just in case. API is an excellent brand!

Rated 5 out of 5 stars
By Kat2 on Apr 13, 2021

Great item

I have a 28 gallon aquarium and use the strips atleast twice per month to check the water. The strips work very well and are super easy to read.

Rated 3 out of 5 stars
By Katec on Mar 4, 2021

Aquarium test strips

The instructions aren't really clear, and the sheet doesn't really explain what the paremeter readings mean, I'll probably just end up taking a water sample to the local pet store and hope they acctually know what they are doing.