Enter pond volume and filtration and see a cautious number of goldfish or koi to keep.
These tools give planning-level estimates from typical values. They are not quotes, designs or engineering, and results depend on your actual soil, depth, access, local rules and conditions. Only a visit can confirm what a job needs, and we give you a clear price before any work begins.
Gallons in the pond.
Goldfish and similar, or koi.
Both change how many fish a pond can hold.
A cautious count of adult fish.
No. It is a cautious planning number. Healthy ponds vary, and we are happy to look at yours.
Fish grow quickly and waste builds up faster than most owners expect.
Yes. More oxygen and better filtration let a pond carry more fish, but fewer fish always stay healthier.
Pond Volume and Gallons CalculatorEnter length, width and average depth and see the gallons your pond holds, the pump flow to aim for and the water for a first fill.Try it 
Pond Liner Size CalculatorEnter the pond length, width and depth and see the liner size to order, with overlap included.Try it 
Pond Pump Size CalculatorEnter pond volume, waterfall width and lift and see the pump flow to look for.Try it 
Pond and Water Feature Cost EstimatorPick a project and a size and get a ballpark planning range.Try it 
Koi and Fish HealthWater testing, feeding plans, stocking advice and early-warning checks that keep pond fish healthy and growing.Explore 
Pond AerationAir diffusers, bottom aerators and fountain aerators that keep oxygen up through hot summer weeks and winter ice.Explore 
Koi PondsDeep, well-filtered ponds built for koi, with the volume, circulation and safety features that keep big fish healthy…Explore Quick scheduling, careful work and a clear price before we start.
