Iron Supplement – Fuel Coral Coloration & Macroalgae Growth Keep your reef system thriving with our ultra-pure Iron supplement. Iron is a critical trace element that supports photosynthesis, vibrant pigmentation, and overall health in both corals and macroalgae. Especially important in systems with refugiums or high coral demand, iron helps bring out those deep greens, reds, and golds. Key Benefits: - Boosts zooxanthellae photosynthesis in corals - Encourages rich coloration in SPS, LPS, and soft corals - Promotes lush, healthy macroalgae growth in refugiums - Supports enzyme function and metabolic balance in reef systems Iron is quickly depleted in active reef tanks and should be replenished regularly to maintain stability and coloration. 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