English CPO Pool Math Workbook is designed for operators, service technicians, health officials, retail technicians, and renovators who need to perform common math, the Pool Math™ Workbook helps people calculate pool surface area, water volume, chemical dosage amounts, saturation index, filter surface area, flow rate, filter flow rate capacity, turnover rate, heater sizing, spa water draining frequency, make-up water amount, maximum user load, and total dynamic head