Choosing Pond Size and Shape First, I had to make a decision about the size and shape of the pond. Working with our PETsMART pond expert, Dr. Nick Saint-Erne, I learned that all ponds require some maintenance. This includes testing the waters , feeding the fish , changing the filters , etc. But as a rule, the larger the pond the more maintenance is required. Dr. Saint-Erne also advised me to place the pond in an area that receives a good amount of both sunlight and shade.
Sunlight encourages the plants to grow, but it also encourages unwanted algae.
Shade helps keep the algae in check, and gives the fish cool, dark hiding areas. When I decided where I wanted my pond to be, I used my garden hose to outline the area. Digging the Hole Without a doubt, digging the hole is the most difficult part of installing the pond. I was going to have to dig a hole that was approximately 12 feet long by 7 feet wide. The step would be helpful for getting out in case my pets, or I, ever happened to fall into the pond.