COLOMBO - GH Test - Analysis of total water hardness

The Benefits of Colombo GH Test

Professional Precision for Optimal Monitoring
The Colombo GH test is designed to provide remarkably accurate results, with a visible color change for quick and easy reading. This level of accuracy is essential for aquarists who are concerned about maintaining a balanced environment. GH represents the amount of dissolved minerals, which are crucial for the health of fish and plants, especially delicate species and aquatic plants.

Easy and quick to use
Designed to be accessible, this GH test includes a color chart and illustrated instructions that simplify each step. In just a few minutes, you will have a reliable reading of total hardness, allowing for quick and frequent testing. The ease of use of this kit makes it a great choice for beginners and experienced aquarists alike.

An Essential Mineral Balance for Water Clarity
A good GH level helps maintain clear water and limit the appearance of algae. Minerals such as calcium and magnesium contribute to a balanced and healthy aquatic environment. The Colombo GH test allows you to monitor this parameter, essential for plant growth and fish vitality, thus reducing the risk of water problems.

Economical and Sustainable
With 40 tests included in each kit, the Colombo GH test is a sustainable and economical solution for monthly monitoring of your aquarium. It is suitable for both the start-up phases, with more frequent checks, and for long-term maintenance. This test is a wise investment for anyone who wants to ensure the quality of their water and the health of their aquatic species.

How to use the Colombo GH Test?

General instructions

• Always make sure the test tube is thoroughly clean before use.
• Clean it thoroughly after each use so that it no longer contains any chemical residue that could distort subsequent results.
• Take the water sample as carefully as possible.
• Hold the vial upright when counting drops.
• Make sure there are no air bubbles in the drops.

Test procedure:

1. Take a 5 ml water sample.
2. Add 1 drop of GH test liquid and shake the test tube. The water sample normally turns red, if it turns green, the GH of the water is less than 1°DH.
3. Then add 1 drop at a time of GH test fluid and shake the test tube after each drop added, until the water sample turns green.
4. The number of drops needed to achieve the color change from red to green gives the GH value in °DH, so 2 drops = 2°DH, 3 drops = 3°DH, etc.

For tests that involve drop counting, such as KH and GH, the value to be measured is reached when the color change occurs. The number of drops added to obtain this result must then be converted to obtain the actual value. This color change occurs within a range of 1 to 2 drops, during which time the water sample exhibits a transient color. The actual end point is reached when the color no longer changes, even if drops continue to be added. These Colombo tests are factory calibrated using professional tests; therefore, Colombo kits guarantee you rigorously accurate measurements!

GH Test Instruction Video