ChaetoGr? Complete phosphate and nitrate free multi-nutrient with iron, cobalt and molybdenum for chaetomorpha growth and vigor in all marine systems Overview For all marine aquariums & ULNS systems Shrimp & Invertebrate safe Phosphate & Nitrate free Provides 13 elements critical to long-term health, growth, and coloration of aquatic plants Well-suited to ULNS aquariums and designed for nutrient control of phosphates and nitrates by chaetomorpha uptake Formulated utilizing extensive research on aquatic algae nutrient requirements