API GH & KH General & Carbonate Hardness Test Kit – Freshwater
Tests tap water and freshwater aquariums for general hardness (GH) and carbonate hardness (KH). Helps detect stress on fish caused by rapid pH shifts, which result from low KH levels and helps aquarists duplicate the natural habitat of their fish.
What is measured
- General hardness (GH) – measures the total concentration of calcium and magnesium ions in water
- Carbonate hardness (KH) – measures the buffering capacity of water, indicating its ability to resist pH changes
Usage
Use this test kit to regularly monitor water parameters in home aquariums or tap water before use. Follow the instructions provided with the test strips and reagents for accurate results.
| Parameter | Measurement Range | Units |
|---|---|---|
| General Hardness (GH) | 0–50 | dGH |
| Carbonate Hardness (KH) | 0–25 | dKH |
FAQ
How often should I test my water using this kit?
It is recommended to test water parameters every 1 to 2 weeks, or more frequently if you make water changes or add new fish to the aquarium.
Can this test kit be used for saltwater aquariums?
No, this kit is designed for freshwater environments only and is not suitable for saltwater aquariums.
Are the test strips reusable?
No, the test strips are single-use and must be discarded after each test.
Angela Parsons –
The kit is easy to use and gives clear results. I’ve been testing my aquarium water weekly and noticed a steady GH and KH level, which helps keep my fish healthy. The instructions are straightforward and the strips don’t fade or give false readings.
Wendy Robertson –
Good for beginners. I used it to check my tap water before adding it to the tank. The KH reading helped me avoid sudden pH drops. The only thing is the color changes take a bit of time to develop.
Michelle Burgess –
Very reliable. I’ve used this kit for over six months and it consistently shows accurate readings. It’s a must-have for any freshwater aquarium setup.