Pond Building Step 2 - Choosing the Right Pond Size and Shape

There are two types of ponds: those constructed from a preformed shell, and those with a "freeform," flexible liner. You can be creative with either type, and you can also join multiple ponds together with waterfalls and streams.

Flexible PVC liners allow you to build ponds in shapes and styles that suit your taste. They're easy to install since they conform to the shape you've created. Flexible liners are suitable for ponds from 50 gallons to 1,500 gallons. For larger ponds, liners can be joined together with a sealing tape. Your local pond retailer can help you select the right materials.

Small pond
Typical size: 4.5 feet x 5 feet x 1 foot deep
100 to 250 gallons


Mid-size pond
Typical size: 5 feet x 12 feet x 1.5 foot deep
250 to 500 gallons


Large pond
Typical Size: 8 feet x 17 feet x 1.5 foot deep
500 to 1500 gallons

Preformed ponds come in several popular shapes, ranging in capacity from 9 gallons to 270 gallons.  You can find many different sizes and shapes of these ponds at your local pond/DIY store.  

To calculate pond volume:  Length ___ ft. x Width ___ ft. x Average Depth ____ ft. x 7.5 = gallons

Step Three: Choose Your Pond Filtration 

TetraPond Pond Sticks – Pond fish nutrition for energy, longevity & health.
TetraPond In-Pond Skimmer skims debris before it sinks.
TetraPond submersible pond light set – Create dramatic lighting effects.