Tetra 7in1 Aquarium Water Testing Kit
Measures seven important water values – pH, general and carbonate hardness (GH + KH), nitrite (NO2-), nitrate (NO3-), chlorine (Cl2) and carbon dioxide (CO2).
- An early warning system to detect poor water quality and ensure aquarium water is safe and healthy
- One-step water test – Easy to use with full information and tips on possible solutions
| Parameter | Measurement Method |
|---|---|
| pH | Color comparison with test strip |
| General Hardness (GH) | Color comparison with test strip |
| Carbonate Hardness (KH) | Color comparison with test strip |
| Nitrite (NO2-) | Color comparison with test strip |
| Nitrate (NO3-) | Color comparison with test strip |
| Chlorine (Cl2) | Color comparison with test strip |
| Carbon Dioxide (CO2) | Color comparison with test strip |
FAQ
How accurate are the test results provided by this kit?
The test results are accurate within standard laboratory ranges for home aquarium use. For precise measurements, always follow the instructions carefully and compare readings with known water parameters.
Can this kit be used for both freshwater and saltwater aquariums?
This kit is designed for freshwater aquariums. Parameters such as GH, KH, and CO2 are relevant to freshwater systems, and it is not recommended for saltwater environments.
How often should I test my aquarium water using this kit?
It is recommended to test water quality weekly during stable conditions and more frequently (every 3–5 days) during new tank cycling or after water changes.




Pippa Rees –
The kit is very easy to use. I followed the instructions and got clear results for pH, GH, and nitrite. It helped me catch a nitrite spike early, which saved my fish. The color chart is well-designed and the test strips don’t fade quickly.
Adrian Fisher –
I used this kit for the first time and found it straightforward. The CO2 test was a bit tricky, but the instructions clarified that. Overall, it’s reliable for checking basic water parameters and gives helpful tips for adjustments.
Cameron Davies –
Great value for the seven parameters tested. I check pH, nitrate, and hardness weekly. The one-step process saves time, and the results are consistent with what I see in my tank’s health.