Kent Pro Plant provides bio-available nitrogen, magnesium and micronutrients for lush freshwater plant growth. Contains no phosphates. The use of Kent Freshwater Plant Supplement simultaneously with the Pro Plant will provide all of the nutrients that the freshwater plants need for vigorous growth and healthy leaves and roots. No laterite is required. Simply add one to three teaspoons of Pro Plant per 30-gal lon of tank capacity one to three times per week, depending on the amount of plants and the desired growth rate.