4-stage RO/DI units produce ultra pure water for aquarium hobbyists that demand the best. AquaFX Barracuda RO/DI Units adds another filtration stage to its premier water filtration technology for TDS rejection rates beyond 90%! Standard unit comes with a high efficiency, 1-micron sediment pre-filter (Stage 1), high-capacity chlorine and Volatile Organic Compound (VOC's) removing Carbon Block (Stage 2) and a special TFC/HI-S RO membrane (Stage 3). The RO membrane is a TFC sheeted element boasting high silicate rejection. Mixed bed DI resin filter (Stage 4) polishes RO water for ultra pure water of the highest quality.

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