The nutrient ratios for corals and sponges in reef tanks are ideal when nitrates and phosphates are present in the lowest concentrations. Tropic Marin NP-Bacto-Balance uses a mix of select organic carbon compounds and suitable inorganic nutrients to promote the natural integration of nitrates and phosphates into additional biomass. This lowers the nutrients in the water and simultaneously prevents deficiencies of nitrates or phosphates. Both the colour and growth in corals, sponges and other filter feeders are visibly improved.