Brightwell Aquatics - NeoPhos - Balanced Phosphorus Source for Phosphorus-Limited, Low-Nutrient Reef Aquaria - Aquarium Water Treatments, 16.9 fl ozBrand: Brightwell Aquatics Features: NATURAL NITROGEN UPTAKE NeoPhos is a phosphorus source for low nutrient reef aquariums. It supports beneficial microbe activity by regulating organic carbon, nitrogen, and phosphorus. Without one of these, microbial uptake slows, leading to increased concentrations of remaining nutrients BALANCES NITROGEN It's designed to work alongside other products like Microbacter7, Reef Biofuel, and Katalyst in reef aquaria