API® Freshwater Master Test Kit
The API® Freshwater Master Test Kit measures the four most important water parameters in freshwater aquariums: pH, high range pH, ammonia, nitrite, and nitrate. It provides scientific accuracy for reliable results, ideal for both hobbyists and professionals.
The kit includes four glass test tubes with snap-tight caps and a convenient holding tub for easy storage and organization. A step-by-step instruction booklet is included, along with a color chart that helps identify unsafe water conditions and provides guidance on how to correct them.
| Test Parameters | Quantity |
|---|---|
| pH | 1 test solution |
| High Range pH | 1 test solution |
| Ammonia | 1 test solution |
| Nitrite | 1 test solution |
| Nitrate | 1 test solution |
| Test Tubes | 4 |
| Instruction Booklet | 1 |
| Color Chart | 1 |
| Total Tests Included | 800 |
We recommend testing your aquarium water weekly to maintain a healthy environment for your fish. This test kit makes monitoring water conditions simple, accurate, and efficient.
FAQ
How often should I test my freshwater aquarium water?
We recommend testing your aquarium water at least once per week to monitor key parameters and ensure a safe environment for your fish.
Can this test kit be used for saltwater aquariums?
No, this test kit is specifically designed for freshwater aquariums and is not suitable for saltwater systems.
Are the test solutions reusable?
The test solutions are not reusable. Each test requires a new solution from the included set.

Jane Springer –
I’ve used this kit for three months now and it’s been very reliable. The color chart makes it easy to interpret results, and the instructions are clear. I can now spot ammonia spikes early and adjust my water changes accordingly. The test tubes are sturdy and the holding tub keeps everything organized.
Yvonne McGrath –
The kit arrived quickly and the components are well packed. I found the step-by-step guide helpful, especially when first starting out. It’s easy to use and gives accurate readings. I still need to learn the exact correction steps, but it’s a solid foundation.
Elizabeth Bell –
I used to rely on expensive lab tests, but this kit is affordable and delivers consistent results. The pH and nitrite readings are especially accurate. I now test weekly and my fish seem healthier than before.