Includes a dosing dropper! Manganese Supplement – Vital Micronutrient for Coral Health & Growth Support the metabolic health and coloration of your reef with our high-purity Manganese supplement. Manganese plays a crucial role in coral enzyme function, aiding in photosynthesis, skeletal development, and pigmentation—especially in LPS and SPS corals. Key Benefits: - Promotes vibrant coloration and tissue strength in corals - Supports essential enzyme and metabolic functions - Helps Goniopora growth and health - Enhances photosynthesis in symbiotic zooxanthellae Manganese is rapidly depleted in reef systems and should be replenished regularly to maintain stable, natural seawater conditions. Recommended beginning dosage is 0.2ml per gallon of water per week. 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. 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