HydroLogic Tall Boy Water Filter | 2 GPM, 120 GPH, 7,500 Gal Dramm KDF85 uses high-purity copper-zinc granules

KDF85 uses high-purity copper-zinc granules and a redox reaction to strip chlorine

Spectrum consistency across fixture batches keeps cultivar response repeatable

Features: Wide drainage channels

hydrangeas

Backlit LCD display

HydroLogic Tall Boy Water Filter | 2 GPM, 120 GPH, 7,500 Gal Dramm KDF85 uses high-purity copper-zinc granulesWhere the Tall Boy Water Filter Sits Between the Two Between the Small Boy and the Big Boy, which is where most growers land. It is a 20 in two stage unit doing 120 GPH at 2 GPM, on a 7,500 gallon capacity. That is double the flow of the Small Boy and better than twice its life, for well under half of what the Big Boy asks. Using It as a Pre Filter Ahead of an RO System HydroLogic positions it that way itself. Chlorine strips a membrane and sediment