The NT Labs Hardness Test provides a simple easy to use testing kit for determining GH and KH levels in fish and koi ponds. The NT Labs Pond Hardness Test Kit comes complete with colour coded test tubes and liquid reagents to provide accurate results for approximately 80 tests.
GH or general hardness is the measure of the total mineral content of the water. Minerals are essential for the health of plants and fish. KH is the buffering capacity or alkalinity reserve of the water in your pond. This buffering capacity prevents sudden pH changes which can be leathal to your fish.
Tests for GH and KH
Easy to use
Colour coded test tubes