KDF Fluid Treatment Provides Patented Water Treatment Media for Water and Industrial Treatment. Founded in 1984, KDF Fluid Treatment, Inc. is a technological leader in the fluid treatment industry. KDF process media are high-purity copper-zinc formulations used in pretreatment, primary treatment, and industrial applications. KDF water filter media supplement or replace existing technologies to dramatically extend system life, reduce heavy metals, microorganisms, scale, lower total cost, and decrease maintenance.