Mantis 4 Stage RO/DI Advanced Unit with integrated TDS meter and 24V booster pump delivers professional-grade water filtration for reef tanks and sensitive aquatic systems. This 378 L/day (100 GPD) system combines sediment pre-filtration, carbon block, RO membrane, and colour-changing DI resin to achieve 99.9% rejection rates and 0 TDS water. Automated features include digital TDS monitoring, filter-change notifications, and auto-flushing for hassle-free operation. Sturdy bracket supports floor or wall mounting. Complete with hoses, tap adaptor, fittings, and tools for straightforward installation and maintenance.