Overview Spectrapure's MPDI MaxPure RO/DI System transforms your tap water into a purified, ultra-clean solution ideal for aquariums. Features include high-flow, 98% rejection TFC membranes, MicroTec 1 micron sediment pre-filter, high-capacity carbon block pre-filter, and a SilicaBuster Color-change DI cartridge. Includes filter wrench and a 3/4" garden hose adapter.