The Core7 Flex Reef Supplements Bulk Edition is a super concentrated dosing solution designed to maintain near natural seawater (NSW) parameters in reef aquariums. Available in 2, 3, or 4 part dosing options, these supplements are essential for stabilizing water chemistry and supporting the vibrant health of marine life. Each set comes with four liters of high-quality formulation, making it an economical choice for experienced aquarists looking to streamline their maintenance routine.