Concentrated Iron Supplement for all Marine Fish & Reef Aquaria Overview Highly-concentrated and stable iron solution for supplementing aquaria containing hermatypic organisms (i.e. “photosynthetic” or zooxanthellate corals, clams, and their allies), macroalgae, coralline algae, mangroves, marsh grasses, and other desirable marine algae and plants. Particularly suited to systems outfitted with a refugium or mud system. Stronger than most competing products. Composed of purified water and ultra-high purity materials. Formulated by a marine scientist.