Nickel 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 nutrient processing and metabolic function - Contributes to the overall stability of tank's microbial processes - Especially beneficial for high-demand SPS and mixed reef systems Nickel is quickly depleted in closed reef systems and is rarely replenished by salt mixes alone. Controlled supplementation helps recreate a more natural seawater environment. DIRECTIONS :   Before dosing product, an ICP test should be completed to assess current tank trace element levels and target levels. See dosing calculation on website to obtain the dosing amount for your tank based on the current and target levels. Dosing should occur in high flow areas, and can be done over a period of time (recommended).  Complete another ICP test in a month to understand trace element depletion levels in your tank and determine how much you should dose to maintain trace levels.  Size​/​Option: 120 mL