Tropical Water Test GH/KH

The Tropical Test GH/KH is a dual-purpose water hardness test kit designed to measure both general hardness (GH) and carbonate hardness (KH) in aquariums and ponds. It uses a titrimetric method, making it straightforward to use and reliable for regular water quality monitoring.

How It Works

Testing with this kit is a simple drop-by-drop process — add the reagent solution to your water sample and count each drop until the colour changes. Each drop equates directly to one German degree of hardness, so reading your result requires no calculation. One kit covers both GH and KH measurements.

Why GH and KH Matter

Many species tolerate a broad hardness range, but for others — particularly soft or hard water specialists — maintaining the correct GH and KH levels is directly tied to long-term health and breeding success. Carbonate hardness plays an additional role in pH stability: higher KH buffers against pH swings, though it can also make deliberate pH adjustments more difficult to achieve.

Part of a Complete Testing Regime

GH and KH are two parameters in a wider picture of water chemistry. For thorough monitoring, this kit works alongside other Tropical test kits covering additional parameters to give a full profile of your water conditions.

Straightforward to use and specific in what it measures, the Tropical Test GH/KH gives aquatic keepers clear, actionable data on the hardness levels that matter most to their livestock.