Nickel, 120 mL, Highly Concentrated Trace Element Supplement for Reef Aquarium Milliliters:120 mL Granular Ferric Oxide (GFO) should

Granular Ferric Oxide (GFO) should be used as a part of your tank filtration tools primarily to control phosphate levels

If used regularly

5 mL per 20 gallons daily

Part 1 of our Complete Tank System is packed with bioavailable Calcium and Magnesium

Hammer $10 per head min

Nickel, 120 mL, Highly Concentrated Trace Element Supplement for Reef Aquarium Milliliters:120 mL Granular Ferric Oxide (GFO) shouldNickel Supplement Trace Element Support for Coral Enzymatic Function Includes a dosing dropper! Complete your reef's trace element profile with our lab grade Nickel supplement. Though required in only minute amounts, Nickel is essential for certain enzymatic processes in corals and other invertebrates, aiding in nutrient assimilation and overall metabolic health. Key Benefits: Supports essential enzyme systems in corals and marine life Promotes proper