Iron and manganese are essential to the health of all plants, including the macro algae that are commonly cultivated in refugium aquariums. Julian Sprung’s Reef Formula Iron Concentrate is a critically important source of these trace elements for ornamental macroalgae, sea-grasses, and the symbiotic zooxanthellae in corals and sea anemones. 250 ml (8.4 oz) & 500 ml (16.8 fl oz) bottle, and 1 Gallon.
