Tetra Test General Hardness – Aquarium Water Testing Kit
The General Hardness (GH) of water has a direct influence on the regulatory functions of fish (fish skin, gills, and eggs), plants and microorganisms.
A favorable GH value for most ornamental fish is between 6 and 16 dH (degrees of General hardness).
Often overlooked in favor of pH, ammonia, and nitrite testing, General Hardness is essential for selecting fish suitable to local water conditions or evaluating the effectiveness of advanced filtration methods such as reverse osmosis or deionization.
This kit includes one 10-ml test reagent, a test vial, and detailed instructions and recommendations.
Designed for use in freshwater aquariums only.
| Component | Quantity |
|---|---|
| Test Reagent | 1 x 10 ml |
| Test Vial | 1 |
| Instructions | Included |
FAQ
What is the recommended General Hardness range for most ornamental fish?
The recommended General Hardness range for most ornamental fish is between 6 and 16 dH.
Can this test kit be used for saltwater aquariums?
No, this kit is designed for freshwater aquariums only.
How do I interpret the test results from this kit?
Follow the instructions provided in the kit to perform the test. The color change in the test vial will correspond to the GH value, which is indicated by the color chart included in the instructions.
Nicholas Dowd –
Easy to use and accurate. I’ve been testing GH regularly and it helps me maintain stable water conditions for my cichlids. The instructions are clear and the reagent stays effective for several uses.
Christopher Manning –
Good for checking GH levels. It’s simple to follow and gives reliable results. I use it monthly to monitor changes after water changes or filter maintenance.
Luke Payne –
This kit is a must-have for any freshwater aquarium. I noticed better fish health after consistently monitoring GH. The vial and reagent are well-packaged and durable.