Fish Science kH Reducer

Fish Science kH Reducer is a water chemistry treatment designed for freshwater aquarists who need to lower carbonate hardness and bring pH under tighter control. Whether you're keeping soft water species or fine-tuning conditions for a specific biotope, this gives you a reliable, measured way to reduce mineral content without dramatic swings.

What It Does

Carbonate hardness buffers pH upward, making it difficult to achieve and hold lower pH values in harder tap water. Fish Science kH Reducer tackles this directly by reducing kH, which in turn makes pH easier to manage and allows you to create the softer water conditions that many tropical species require.

Key Features

• Lowers carbonate hardness (kH) in freshwater aquariums
• Supports improved pH stability and control
• Gradual, controlled action reduces the risk of sudden chemistry shifts
• Suited to soft water species and precision water chemistry setups
• For use in freshwater aquariums only

Dosing Guide

Add 25ml per 100 litres of aquarium water to reduce kH by 2 degrees. Do not reduce kH by more than 1 degree per day to avoid stressing livestock.

A straightforward, no-guesswork treatment for keepers who take water chemistry seriously — Fish Science kH Reducer puts consistent, repeatable results within reach of any freshwater setup.