Colombo GH General Hardness Freshwater Test Kit (Best Before Date September 2025)

A correct General Hardness (GH) is essential for clear water.
GH is a measurement for the total amount of dissolved minerals in the water; these minerals mainly consist of Calcium. These minerals are essential for the well being of your fish and plants.

30 years of experience!
Colombo produces professional products for the maintenance of your aquarium and pond. Our company is based in the Netherlands. Our products are developed with over 30 years of experience and continuous improvements supported by solid research and product development. Every product is tested intensively before we market it; this way we can guarantee optimal results.
During the product development we have focused on creating products that are both user friendly and high quality.