Phosphate + Phosphate + contains concentrated phosphate to replenish depleted phosphate to the desired level in ultra-low nutrient systems (ULNS). Many issues can occur in ULNS, for example, loss in coral colour or bleaching, fatigued coral and slow growth from nutrient deficiency. Adding nutrients back into a ULNS will increase the zooxanthellae population. Overdosing will cause unwanted algae growth. Directions: This product is to be used in conjunction with calibrated testing equipment or ICP-OES to determine depletion. 2 drops (0.1ml) will raise 100L of aquarium water by 0.05 ppm. Ingredients: - Demineralised water - Concentrated Phosphate @ 50000 ppm Keep out of reach of children and pets. Storage: Keep out of direct sunlight. Always secure cap on.