Captive Purity manufactures water filtration and water testing supplies for marine and reef aquaria. The brand is best known for their high-quality line of reverse osmosis filter systems and accessories. Captive Purity also produces refractometers for testing salinity, portable pen-sized meters for testing pH as well as replacement filter media for their RO and RO/DI filter systems.
Captive PurityCaptive Purity Replacement O-Ring for RO Filter System
Captive PurityStandard Faucet Adapter / Quick Connect Faucet Coupler