Prodibio Bioptim Pro for Freshwater and Saltwater provides BioDigest's bacteria with the micronutrients needed for an optimal cleaning of saltwater (enzymes, trace elements, amino acids, vitamins, plant surfactants), and thus enhances the water quality. Bioptim also provides trace elements: sulphur for proteins, iron for plants and fish blood, cobalt for B vitamins & calcium, magnesium, manganese, zinc, molybdenum and potassium.