Two Little Fishies Iron Concentrate Julian Sprung s Reef Formula 250 ml.Two Little Fishies Iron Concentrate is a solution that contains the elements iron and manganese, which are essential to the health of all plants, including the symbiotic zooxanthellae in corals and sea anemones, and sea-grasses. Two Little Fishies Iron Concentrate safely replenishes iron and manganese in the proper ratio, which helps maintain optimum water quality for the growth of corals and the macro algae that are commonly cultivated in refugium aquariums.Available in 250 ml (8.4 oz) and 500 ml (16.8 fl oz) bottlesTwo Little Fishies, Inc. was founded in 1991 to promote the reef aquarium hobby with its introductory video and books about reef aquariums. The company now publishes and distributes the most popular reef aquarium reference books and identification guides in English, German French and Italian, under the d.b.a. Ricordea Publishing.Since its small beginning, Two Little Fishies has also grown to become a manufacturer and importer of the highest quality products for aquariums and water gardens, with international distribution in the pet, aquaculture, and water garden industries. Two Little Fishies product line includes trace element supplements, calcium supplements and buffers, phosphate-free activated carbon, granular iron-based phosphate adsorption media, underwater bonding compounds, and specialty foods for fish and invertebrates. Two Little Fishies also offers beautifully engineered plastic fittings used for air and water plumbing in aquariums, water gardens and paludariums.It is our company mission to manufacture and distribute products of the finest quality that are simple, elegant, practical, and useful. By providing these intelligent solutions and publishing the latest information about how to build successful and beautiful aquariums, we enhance everyone¿s enjoyment of their aquatic hobby. This way we build a following of happy successful customers.