Plant Essential® Bio-Molecules™ is scientifically formulated to safely increase phosphate and stimulate plant growth. Phosphate is an essential building block to DNA, many proteins, energy storing & other essential molecules. Bio-Molecules™ allows you to modify your N:P ratio based on the needs of your aquarium. Dosing equal amounts with Bio-Nutrients™ will provide a 5:1 N:P ratio, however you can modify this by simply adjusting the ratio of Bio-Nutrients™ and Bio-Molecules™ to achieve other N:P ratios such as 10:1. Recommended Phosphate concentration = 0.15-1ppm.