Bigger is easier
Larger ponds are more stable. Temperature, chemistry and algae swing less in a big volume of water. If you are on the fence, build bigger than you first imagined.
Depth for fish
Fish need deep water in winter and cool water in summer. Two feet is a minimum for goldfish in our climate. Three feet or more suits koi and heat waves.
Shelves for plants
Plants need different depths. A shallow shelf about ten inches below the surface holds marginals, and deeper shelves hold lilies. A mix of shelves and a deep center gives the best of both.
Volume and equipment
Pond volume is the length times the width times the average depth times seven and a half gallons. Pumps and filters are sized from it. Our volume tool does the math.
Shape and slope
Straight, steep walls hold liners well. Gentler slopes look natural but need more care. We choose slopes that keep the liner stable and the stones in place.
Space and safety
Allow room around the pond for edge stone and plants. Think about safety, especially for children and pets, and discuss shallow edges, covers or fencing.
Build it bigger and deeper than you think you need, with shelves for plants.
