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.
The kit includes 7 test solutions, easy-to-read instructions, four glass test tubes with snap-tight caps and a colour chart for reference information.
Key Parameters Tested
| Parameter | Measurement Range |
|---|---|
| pH | 6.0 – 9.0 |
| High Range pH | 8.0 – 10.0 |
| Ammonia | 0 – 0.5 ppm |
| Nitrite | 0 – 0.5 ppm |
| Nitrate | 0 – 50 ppm |
FAQ
How often should I use this test kit?
It is recommended to test water parameters weekly for stable tanks and more frequently during water changes or after adding new fish.
Can this kit be used for saltwater tanks?
No, this kit is specifically designed for freshwater aquariums only.
Are the test results accurate for all types of freshwater fish?
Yes, the test results are accurate for most freshwater fish species under standard aquarium conditions.

Trevor Dickens –
I’ve used this kit for three months now and it’s become my go-to for weekly water checks. The color chart is clear and the test tubes are easy to handle. I can spot ammonia spikes early, which helps me maintain a healthy environment for my bettas.
Lisa Peake –
The instructions are straightforward and the test solutions work well. I noticed a slight variation in nitrate readings compared to other kits, but overall it’s reliable for daily monitoring.
Mary Wallace –
Great value for the five parameters tested. I appreciate the inclusion of high range pH, which helps me adjust water balance during seasonal changes. My tank has stayed stable since I started using this kit.