Best Aquarium Test Kits: Reviews and Buyer’s Guide

Aquarium test kits are important to any fish farmer as they help you maintain water quality and keep your fish healthy. There are many different types of test kits available and it can be difficult to know which one is best for your tank.

In this guide, we’ll go over some of the things to consider when choosing an aquarium test kit and review five of the best products on the market. These products have been chosen for their accuracy, ease of use and value.

What is an aquarium test kit?

An aquarium test kit is a tool that helps you test the quality of the water in your tank. It usually consists of a few different tests such as ammonia, nitrite, nitrate, and pH. Test kits may also include tests for other parameters, such as phosphate and dissolved oxygen.

There are two main types of aquarium test kits: liquid and strip. Liquid test kits are more accurate, but can be difficult to use. Test strip kits are easier to use, but are not as accurate.

Why do you need an aquarium test kit?

So why do you need an aquarium test kit? Let’s take a look at some reasons:

Water quality maintenance

One of the most important reasons for testing water quality is to make sure it is safe for fish. Uneaten food, debris, and decaying plants can contribute to poor water quality, which, in turn, can lead to elevated levels of nitrates, ammonia, and other toxins.

When water chemistry is out of balance, it can cause stress in fish and make them more susceptible to disease. By regularly testing your water quality, you can spot small problems before they become big ones.

Monitor the nitrogen cycle

If you are installing a new tank, monitoring the quality of the water during the cycling process is important. This is when beneficial bacteria are establishing themselves in the filter, and ammonia and nitrite levels are high.

By testing the water during this time, you can ensure that the cycling process is proceeding as it should and prevent any future problems. For example, if ammonia levels do not drop, it could be a sign that the filter is not working properly.

Keep sensitive fish safe

Some fish are more sensitive to changes in water quality than others. For example, bettas are very sensitive to ammonia and even small amounts can be harmful to them. Meanwhile, saltwater fish are very sensitive to changes in the pH levels in their tank; even a small change can cause them stress.

If you have sensitive fish, it is especially important to test the water quality regularly. The average fish farmer should test the quality of the water at least once a week. However, if you have sensitive fish, you may need to test more often. Evaluate the behavior of your fish and if you notice any changes, test the water immediately.

Ensuring the adequacy of the water source

With such a wide variety of different fish species available, it is important to ensure that the water you are using is suitable for the fish you are raising. For example, African cichlids prefer hard water with a high pH, ​​while neon tetras prefer soft water with a lower pH.

Therefore, the composition of the water in your area will play a large role in the type of fish you can breed. It is always good to test basic water parameters such as pH, hardness, and alkalinity before adding fish to your tank. This will help you avoid any problems in the future.

If you are determined to keep a certain species of fish, you may need to use a water conditioner to change the parameters of the water to suit your needs. For example, a regular chlorine/chloramine remover will not lower the hardness of your water. However, there are products available that will change the hardness and pH of your water to meet the needs of your fish.

What to Consider When Choosing an Aquarium Test Kit

Now that we’ve gone over some of the reasons why you need an aquarium test kit, let’s take a look at some of the things to consider when choosing one.

Number of water parameters tested

The first thing to consider is how many water parameters the kit analyzes. The three most important water parameters to test are:

  • ammonia levels
  • nitrate levels, and
  • pH levels

However, there are other water parameters that you may want to test, depending on the fish you have. For example, saltwater test kits will also test for alkalinity, magnesium, and calcium levels. On the other hand, if you have plants in your aquarium, you may want to check the phosphate levels.

A simple test kit that only tests for ammonia, nitrate, and pH levels is usually sufficient for the average fish farmer. However, if you have sensitive fish or plants, you may want to invest in a more comprehensive test kit. Most importantly, make sure your test kit meets industry standards, which brings us to the next point:


It may sound like a given, but you need to make sure your test kit is accurate. Accurate testing is essential to maintaining a healthy aquarium. Unfortunately, not all test kits are created equal. In fact, some test kits on the market are known to give completely false readings.

In terms of accuracy, you really do get what you pay for. Cheap test kits you can find at your local pet store are often inaccurate. These may work for periodic testing if you have a large aquarium, but if you have a small aquarium or sensitive fish, you should be able to trust your test results.

A much better way to approach aquarium testing is to focus on precise measurements. Liquid test kits that use a syringe to draw a water sample are often more accurate than test strips. This is because test strips often rely on a chemical reaction that can be affected by various factors, such as the temperature of the water.

On the other hand, liquid test kits generally give more accurate results because they are not affected by these factors. Instead, they provide a direct measurement of the water parameter in question.

Easy to use

Another important aspect to consider is the ease of use of the test kit. While accuracy is important, it won’t matter if you can’t figure out how to use the test kit. Generally speaking, strip test kits are much easier to use than liquid test kits. All you have to do is dip the strip in the water and compare the results with the chart included in the kit.

On the other hand, Liquid test kits can be much more difficult to use compared to a strip-style test. Although both involve a color comparison chart, liquid test kits require you to draw a sample of water with a syringe and then add the reagents. Playing with glass vials and bottles of test solutions can be frustrating, especially if you are trying to test many different water parameters.

On the other hand, some hobbyists find the ambiguity of test strips frustrating. They are not sure if the color chart should be read in direct sunlight or under artificial light. Manufacturers often forget to mention this, leading to confusion and inconsistent results.


Last but not least, you should consider the price of the test kit. Aquarium test kits can range from $10 to $100, depending on the brand, the number of essential parameters it tests, and the total number of comprehensive tests a single kit can perform.

Some test kits can test for multiple water parameters with a single kit. For example, the API Freshwater Master Aquarium Water Test Kit, often considered the gold standard in aquarium test kits, can test for ammonia, nitrate, nitrite, pH, and high-range pH.

On the other hand, some hobbyists have basic ammonia test strips or a nitrite test kit. These tests for a single water parameter are not as comprehensive as more expensive options. Remember that you don’t need to break the bank to get a quality aquarium test kit.

Top 5 Aquarium Test Kits – Reviews

Now that we have a better idea of ​​what to look for in aquarium test kits, let’s look at five of our top picks!

1. API 5 in 1 test strips

  • Brand: API
  • Item Dimensions LxWxH: 3.5 x 1.75 x 6.5 inches
  • Item Weight: 0.2 Pounds

We’re kicking off this list with something that’s intuitive and easy to use. API 5-in-1 Test Strips are a great option for those looking for an all-in-one testing solution. Convenience is key here, as you’ll be able to test five different water parameters – pH, Nitrite, Nitrate, General Hardness, and Carbonate Hardness – with a single strip. Although ammonia is not tested for, it is still a great way to monitor the overall health of your tank.

Unlike test kits that require vials and liquid solutions, these strips provide results in just seconds. Simply dip the strip into your aquarium water and remove it after a few seconds. Shake the strip in the water to ensure even coverage, then compare the color of the strip to the chart provided. This box will tell you what range your water parameters are in, so you can make any necessary adjustments.

Keeping in mind that these strips are not as accurate as other testing methods. If you’re looking for pinpoint accuracy, you may want to consider another option on this list. Also, you’ll need to invest in a separate ammonia test kit, as this is often considered to be one of the most basic tests to perform on a tank.


  • All-in-one test solution for basic parameters


  • It is not as accurate as other methods.
  • Does not test for ammonia

2. API Freshwater Master Test Kit

  • Brand: API
  • Item Weight: 1.15 pounds
  • Item Dimensions LxWxH: 9.13 x 3.5 x 4.63 inches

The API appears on this list more than once, and for good reason! API Test Kits have a reputation for being one of the most trusted in the aquarium industry and their products never disappoint. The Freshwater Master Test Kit is a great option for those looking for a complete test kit that meets all their needs.

This water test kit comes with everything you need to test pH, high range pH, ammonia, nitrite and nitrate levels. These are the 5 water parameters you’ll want to keep a close eye on, as they are most likely to fluctuate. Investing in a kit that tests all of these parameters can also save you money in the long run, since you won’t have to invest in individual test kits for different test parameters.

Many aquarists appreciate the fact that this kit uses liquid solutions instead of strips. This provides a higher level of accuracy, which is important when it comes to maintaining a healthy aquarium. However, it should be noted that this kit requires the use of vials, which some people may have difficulty working with.


  • All-inclusive trial solution
  • Comes with instruction booklet
  • Use liquid solutions for greater accuracy.


  • Requires the use of vials

3. SaySummer 7-Way Aquarium Test Strips

  • Brand: Saysummer
  • Item Dimensions LxWxH: 4.37 x 1.85 x 1.38 inches
  • Item Weight: 1.76 pounds

Looking for something that gives you the convenience of test strips, with the range of a liquid test kit? SaySummer’s 7-Way Aquarium Test Strips may be just what you’re looking for. With these strips, you will be able to test for pH, Chlorine, Total Hardness, Ammonia, Nitrite, Nitrate and Carbonate Hardness.

One thing that sets these strips apart from other options on the market is that they are designed for both freshwater and saltwater tanks. This makes them a great option for those who have multiple aquariums or are thinking of switching between them.

Another thing I love about these strips is that they deliver results in just seconds. Simply dip the strip into your tank water and wait for the color to change. Then compare the strip to the included color card to determine the water parameters.


  • Tests for a wide range of water parameters
  • Designed for freshwater and saltwater tanks
  • Provides results in just seconds.


  • Not as accurate as liquid tests

4. Red Sea Fish Pharm ARE21525 Aquarium Marine Care Test Kit

  • Brand: Saysummer
  • Item Dimensions LxWxH: 4.37 x 1.85 x 1.38 inches
  • Item Weight: 1.76 pounds

Very few test kits are formulated specifically for reef tanks, making Red Sea Fish Pharm’s ARE21525 Marine Care Test Kit unique. This kit has everything you need to test pH, ammonia, nitrite, nitrate, and alkalinity levels. These are the 5 most important water parameters to test in a marine aquarium, especially if it houses sensitive corals.

Getting an accurate reading is of the utmost importance when testing marine tanks, as even slight changes in water parameters can drastically affect the health of your fish. The Red Sea Fish Pharm ARE21525 Marine Care Test Kit uses liquid solutions instead of strips. This provides the highest level of accuracy possible. Plus, the durability of the included test vials makes this kit a great investment.

One potential drawback to this kit is that it is one of the most expensive options on the market. Compared to other saltwater tank test kits, it also takes a bit longer to get results with this one. However, many marine aquarium hobbyists feel that the price is worth the level of accuracy provided. After all, you can’t put a price on peace of mind.


  • Formulated specifically for marine tanks.
  • Tests for the 5 most important water parameters in marine aquariums
  • Uses liquid solutions for accurate measurement
  • Includes durable test vials.


  • More expensive than other options
  • Takes a little longer to get results

5. Complete Tetra EasyStrips Aquarium Test Kit

  • Brand: tetra
  • Item Dimensions LxWxH: 6 x 4 x 1.13 inches
  • Item Weight: 0.317 ounces

We round out our list with another strip-based test kit, the Tetra EasyStrips Complete Aquarium Test Kit. This kit includes 25 strips and tests for ammonia, nitrate, nitrite, water hardness, chlorine, alkalinity, and pH levels. Frankly speaking, this is as comprehensive a test strip as you’ll find on the market.

To use these strips, simply dip them into your tank water and wait for the color to change. Then compare the strip to the included chart to determine your water parameters. We like this kit because it comes with an instruction booklet that walks you through each step of the testing process. This is great for beginners who are starting to get used to testing their tanks.

Another thing to note is that this is not as accurate as the liquid test like most test strip kits. However, it is much cheaper and easier to use than liquid tests. If you’re on a budget, this test kit will allow you to test your freshwater tank fairly regularly without burning a hole in your pocket.


  • Tests for 7 water parameters
  • Comes with an instruction booklet


  • Not as accurate as liquid tests

final thoughts

We hope this article has helped you find the best aquarium testing kit for your needs. As we’ve discussed, there are a few different things to consider when deciding. These include the number of water parameters tested, accuracy, ease of use, and price. By considering all of these factors, you should have no problem choosing the best aquarium testing kit for your tank.

Do you find helpful this article? Check out our other articles on aquariums, fish care, and more! As always, feel free to contact us with any questions or comments. We are happy to help!

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