Plus by PolypLab is a concentrated, vitamin-infused coral food for reef aquariums. Plus is a water-stable mixture of liquid and solid coral foods formulated to promote long term health in your coral. Selected vitamins and minerals have been added to support your coral's growth and intensify coloration with regular use, which is most noticeable in SPS corals. Unique for a coral food, Plus has been created to be free of nitrates and phosphates, making this food very low impact on your overall marine ecosystem. PolypLab's original creations are sure to keep your aquarium ecosystem happy and encourage healthier overall coral growth!