-50% on a selection of fish food
A reverse osmosis unit passes tap water through a membrane that removes almost all mineral salts, limescale, nitrates and chlorine. It produces pure water, which is then brought back to the desired hardness. It is the answer when mains water is very hard or high in nitrates, or when a hydroponic crop calls for a precise nutrient solution.
Choose the capacity according to your daily needs, from a few dozen to several hundred litres per day. Pre-filters and membranes wear out: replacement cartridges are in this collection.













