I am looking at changing foliar fertilizer this year. I am looking at this 18-3-6 50% SRN with Micronutrients. It is made by Plant Food Co. I can purchase 5 gals for $106. It says apply at the rate of 4 ounces per 1000 sq. ft. or approximately 1.25 gallons per acre. How many ounces should I put in for 65gal of water?