Start with the pond you have, then choose equipment that matches its needs. Browse our research-based buying guides and practical explanations.
Start here
- Does a pond need a filter?
- How to size a pond filter
- Best pond filters: four options for different layouts
All published guides
How to Size a Pond Filter: Volume, Fish Load and Real Flow
A step-by-step sizing guide with worked volume and flow calculations, fish-load checks and installation questions.
Does a Pond Need a Filter? Wildlife, Goldfish and Koi Ponds
Decide whether your wildlife, goldfish or koi pond needs added filtration, using the needs of the actual pond.
Best Pond Filters: Four Options for Different Garden Ponds
Four research-based options, with the installation and ownership details that matter before you buy.