Brightwell Aquatics - FLORIN-FE• Provides both ferrous (Fe2+) and ferric (Fe3+) ironsources to maximize benefit to planted aquaria.• Two-tiered approach to iron supplementation consistsof one ingredient to deliver immediate iron andanother ingredient that slowly releases iron during thelight cycle, when the aquarium is illuminated.• Over 50% stronger than most competing products.• Formulated utilizing extensive research on aquatic plantnutrient requirements.Liquid500-mlPart #: ABAFNF500Item Name: Florin - fe Ferrous & Ferric Iron 17oz 500mlID: 26864-pid