API Freshwater Master Test Kit
The API Freshwater Master Test Kit contains everything you need to monitor and treat the five biggest aquarium parameters for optimal tank health. The complete kit measures levels of pH, High Range pH, Ammonia, Nitrite and Nitrate, all of which can have lethal impact on your aquatic ecosystem if left unchecked, as these sensitive balances can change rapidly in response to fish waste, uneaten food, algae and water additions.
API test kits deliver unparalleled accuracy for home users and provide quick results for on-the-spot adjustments. The kit includes 7 test solutions, easy-to-read instructions, four glass test tubes with snap tight caps and a color chart for reference information.
Key Parameters Tested
| Parameter | Test Included |
|---|---|
| pH | Yes |
| High Range pH | Yes |
| Ammonia | Yes |
| Nitrite | Yes |
| Nitrate | Yes |
To use the API aquarium test kit, simply fill the test tubes with tank water and react with the appropriate solution. Compare the resulting color to the color chart for accurate readings.
FAQ
How often should I use the API Freshwater Master Test Kit?
It is recommended to test pH, ammonia, nitrite, and nitrate at least once a week, and more frequently during water changes or after adding new fish or food.
Can this test kit be used for saltwater aquariums?
No, this test kit is specifically designed for freshwater aquariums and may not provide accurate results for saltwater environments.
Are the test solutions reusable?
No, the test solutions are single-use and must be discarded after each test.

Alison James –
I’ve used this kit for three months now and it’s been very reliable. The color chart is clear and the results are consistent. I can easily check my tank’s parameters without needing professional tools. Great value for home aquarium owners.
Sean McLean –
The instructions are straightforward and the test tubes are easy to handle. I noticed a small variation in nitrate readings at first, but after following the steps carefully, it became more consistent. Would recommend to anyone starting with freshwater tanks.
Phil Hudson –
This kit has made it much easier to maintain my fish tank. I used to worry about water balance, but now I can check everything in minutes. The high range pH test is especially useful for maintaining stable conditions.