40 pounds of Aquaplancton consists of four 10 pound bags and is suitable for treating 400 square feet of water. FEDEX shipping is free in the USA to 48 states (and USPS to HI/AL) There is no need to measure the depth of your pond no matter how deep it is just calculate the surface area at roughly the length times the width in feet. You will need one pound of Aquaplancton for every 10 square feet of surface area of your pond.
