Gardeners who use their Merlin Garden Pro reverse osmosis system to produce over 140 gallons of RO water per week on average may be unnecessarily shortening the life and efficiency of the unit’s RO membranes and pre-filter. The Tall Blue Pre-Filter takes up to 99% of chlorine and 90% of other impurities out of its feed water so the Merlin doesn’t have to, extending its on-board pre-filter’s life by up to three times normal. The Tall Blue is 11” wide, 24” tall, and possesses the same fittings as the Merlin Garden Pro, allowing for optimal flow from unit to unit and easy installation. One-year manufacturer’s warranty.