Brightwell Aquatics BlackWater Humic Fulvic Acid Supplement Simulates Natural Blackwater Conditions Supports Nutrient Uptake in Freshwater Planted Aquariums, 500 mlBrand: Brightwell Aquatics Color: Clear Features: ENHANCES BLACKWATER CONDITIONS Provides humic and fulvic acids to simulate natural blackwater rivers found in tropical freshwater environments. SUPPORTS PLANT NUTRIENT ABSORPTION Increases nutrient bioavailability for plants by improving uptake of iron, calcium, and trace elements. ENCOURAGES NATURAL SPAWNING BEHAVIOR Mimics rainy season cues to promote spawning in species like Discus and Cardinal