Contains the micronutrients Boron (B), Copper (Cu), Zinc (Zn), Molybdenum (Mo), Iron (Fe), and Manganese (Mn) that are crucial for fish growth. Soluble fertilizer that should be applied March thru November. Use a Secchi disk to determine visibilty - apply when visibility is over 24 in. Proper pond fertilization can increase carrying capacity up to 400%!! Has micronutrients that granular fertilizers don’t have. Apply 4 to 8 pounds per acre as needed according to Secchi disk reading. Normally applied 6 to 8 times per year.