TheCoolfilter Domestic Type RO/Di Water Purification System TheCoolfilter Providers 200-400 Gallon Per Day of Clean & Clear Deionization WaterAquaPro Deionization Water Suitable for your Aquarium, Laboratories, Pet and Many other Uses where high production of Ro/Di water is needed. Thoroughly tested & Proven to remove 99% contaminants & even the smallest impurities for perfect 0 TDS Water. TheCoolfilter Ro/DI System Removing Chlorine, hardness, heavy metals, toxins and long list of other water impurities.