The basic formula for calculating the volume in gallons of a pond is to use the formula L x W X D x 7.5 where L is the Length in Feet, W is the Width and Feet and D is the Depth in feet. Most ponds are not perfectly squares or circles so when you use the pond volume calculator you should make allowances for variations in depth and shape. Try to use averages when you enter the data and when your pond is irregular shaped with depth variations give up to 20% variation to what this calculator shows. For Rectangular Pond: Water Volume = length (feet) X width X average depth X 7.5 gallons/cu. foot = GALLONS For an Oval Pond: Water Volume = 0.8 X ( length (feet) X width X average depth X 7.5 gallons/cu. foot) =
Ethylene Propylene Diene Monomer, EPDM, is a flexible material that can easily conform to any configurations you choose. When selecting a liner, make sure to get one that is meant for ponds. Unfortunately, pool liners or roofing material often get experimented with and pond owners learn a hard lesson. These materials often are constructed with chemicals to reduce algae or mold that can be harmful to fish and they may tear easily. Instead, stick with LifeGuard 45 mil EPDM Pond Liner. It is safe for fish, plants, and wildlife and is the ideal product to give your feature a natural look. Start by getting the measurements for the longest, widest, and deepest points of your pond or pond to be. Next punch these numbers into the calculator: (Length + (2 x Depth + 1)) by (Width + (2 x Depth + 1)).
Choosing a pump takes a little work, you can’t just run out and get any old pump that’s on sale and hope it works. You need one that’s going to be able to run the pond you’re building and that could be as small as a 100 gallon preformed pond to 10,000 gallon show pond full of prize wining Koi. So hear are some things to think about and how to figure them out. How many gallons is the pond? Do you have a waterfall and if so how high and wide is it? Is the pump going to have to more the water a long way before returning to the pond? Will you have a long twisting stream that starts on the other side of the yard? What style of pump are you going with, in the water or out