API 5 in 1 Freshwater & Saltwater Aquarium Test Strips

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25 count
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  • 25 count
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Help keep your fish healthy and thriving by testing your aquarium water regularly with API's easy-to-use 5 in 1 Aquarium Test Strips. Poor water quality can cause fish stress, illness and can even lead to fish loss. API's 5 in 1 Aquarium Test Strips measure five of the most important aquarium factors including pH, nitrite, nitrate, carbonate and general hardness. Just dip a strip directly into your freshwater or saltwater aquarium and use the color-coded chart to determine if your water is safe, or if adjustments are needed. Then follow the recommendations to treat the water—it’s that simple!

Key Benefits
  • 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.
What's Included

Test strips, easy-to-read instructions, information on how to correct unsafe water conditions.

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

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  • Item Number
  • Brand


  • Aquarium Type

    Freshwater, Saltwater


How do API 5-IN-1 TEST STRIPS work?

Test strips are a fast and easy way to test your aquarium water parameters! Simply dip a strip into your water and swirl a few times, then remove the strip and hold flat to evaluate color changes. Compare these colors to the color chart included with API TEST STRIPS, and treat your water accordingly.

How accurate are API 5-IN-1 TEST STRIPS?

API 5-IN-1 TEST STRIPS are highly accurate in measuring water parameters when used as directed.

Do API 5-IN-1 POND TEST STRIPS work for testing oxygen levels?

API 5-IN-1 POND TEST STRIPS only measure pH, Nitrite, Nitrate, Carbonate Hardness, and General Hardness.


Fish Care Made Easier

API is a name you can trust when it comes to taking care of fish. Not only are they passionate about fishkeeping, but they're dedicated to improving the hobby and making it easier to maintain the ideal aquatic environment. From helping the novice set up a new tank to providing state-of-the-art filters for advanced systems, you can rely on API's dedication to quality.

Fish Care Made Easier
Maintain the Perfect Setup

Maintain the Perfect Setup

Fishkeeping is a much easier task with API, because they've taken all the guesswork out of setting up a tank and maintaining it. Their proven treatments include water conditioners and clarifiers, fish medications, pH adjusters, algaecides and quick-start solutions—all designed to keep your aquarium crystal clear and your fish happy and healthy.

Testing Is Key

Once you've started a new aquarium, the only way to keep it in perfect balance is with routine water testing. API gives you all the tools you need to create a nurturing environment for both fish and live plants. Their comprehensive Master Test Kits are tailored to freshwater, saltwater or reef environments, and individual tests for things like pH, ammonia or nitrites leave nothing up to chance.

Testing Is Key
Clearing the Water

Clearing the Water

API offers reliable three-step filtration for tanks of all sizes with their FILSTAR XP Canister filters and wide variety of filter media. These powerful filters constantly circulate the water, trapping organic waste and odors, removing harmful ammonia and contaminants, and helping good bacteria to thrive in the tank.

Superior Nutrition

Feeding your aquarium inhabitants, whether they're tropical fish, turtles or newts, is something that can be tricky without the right food. API developed a special diet for every type of fish—one that's highly palatable, which leads to less waste in the tank. And that means less ammonia to cloud the water. For your turtle friends, premium floating pellets and stick treats provide multiple vitamins for a stronger, healthier shell.

Superior Nutrition
About API

About API

Through extensive and continuous research and development, API created quality products for all levels of fishkeeping. As people who are passionate about fish care, they understand the rewards of keeping up a successful aquarium or aquarium. With easy-to-read guides and premium treatments, foods, filters and testing equipment, API helps aquarists establish and maintain an environment where fish can flourish.

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Customer Reviews
7 Reviews 7 Reviews 3.3 out of 5 Stars

57% Recommend

57% of reviewersrecommend this product

3.3 / 5

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  • Not accurate enough

    By on

    These are good for testing your water if you have nothing else, but that's about it. They just aren't accurate. The API master test kit with the drops is much more reliable and has solutions for everything you would need to test for: nitrates, nitrites, pH, and ammonia. It also gives you a lot of tests for your money. I would highly suggest spending the extra money over getting these.

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  • Easy and foolproof

    By on

    The strips are as described the indicator is easy to read and understand

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  • Not the Worst!

    By on

    Product isn't the worst thing you could buy, it's good for testing in a pinch. I wouldn't use this as your standard everyday testing kit, it's much more of a emergency type thing.

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  • Not very reliable

    By on

    The colors are very difficult to distinguish from the chart, and I am getting very different results as compared to my api master test kit. I would not feel comfortable using these strips as my main test kit.

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  • Great.item.

    By on

    Every thing was supper good, items were what I expected. 5 stars.

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  • Doesn't replace API "drop" tests

    By on

    I purchased this product to check accuracy for spot checking my aquariums rather than doing drop tests all the time. I found gh and kh extremely hard to read. The ph was way off. I tested the tank first with the standard drop tests. I keep 20+ aquariums and as they "multiplied" testing became more arduous.

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  • Easy to use! No mess.

    By on

    API is a wonderful aquatic company. Many products to choose from. Explanations made simple. I just don't understand why Chewy's would charge for shipping on such an inexpensive product.

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