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EnglishWhat Is a Pond and How Do You Start a Backyard Water Garden?
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A pond, in the water-gardening sense, is a contained body of water you build and manage for plants, fish, or wildlife — not just a decorative fountain or waterfall. If you want to start one, the practical path is: pick a site with the right light and no runoff problems, choose a liner or preformed basin, add a pump and filter sized to the volume, plant it (lilies and hyacinth are common choices), and decide whether you want fish. Beginners in the Toronto area can shortcut a lot of trial and error by joining a local club such as the Greater Toronto Water Garden & Horticultural Society, which welcomes everyone from beginners to professionals.
What separates a pond from other water features
A fountain or waterfall is primarily a moving-water display. A pond is a living system: still or slow-moving water that supports plant roots, microscopic life, and — if you choose — fish. That difference drives everything else, because a pond has to hold water, cycle it, and stay in balance rather than just look good for an afternoon.
The core components
| Component | What it does | What to decide |
|---|---|---|
| Liner or basin | Holds the water and defines the shape | Flexible liner for custom shapes; preformed rigid basin for simpler installs |
| Pump | Moves water for circulation and to feed a filter or waterfall | Flow rate matched to pond volume and any feature it supplies |
| Filter | Removes debris and supports the bacteria that process waste | Mechanical, biological, or combined, sized to volume and fish load |
| Heater (optional) | Keeps a hole open or moderates temperature in cold months | Whether you overwinter fish and how cold your winters get |
The club's own keyword list — pond pump, pond heater, pond filter — maps directly onto this set, which is a useful checklist of what a working pond actually needs.
Plants: lilies, hyacinth, and what they do
Water lilies and water hyacinth appear in the society's materials as standard pond plants. Their practical roles:
- Lilies root in the bottom and float leaves on the surface, shading the water and reducing algae.
- Hyacinth floats freely and draws nutrients straight from the water column, competing with algae for the same food.
Both are usually sold as plants you place rather than seeds you sow, so the decision is about coverage — how much of the surface you want shaded — not about germination.
Fish: koi or goldfish
The club's keyword list includes "koy" (koi), and the choice matters because it changes your filter and volume requirements.
- Goldfish are hardier, cheaper, and tolerate smaller ponds and wider temperature swings.
- Koi grow large, produce more waste, and need more volume, stronger filtration, and more careful winter management.
If you are new to ponds, goldfish let you learn the system before committing to koi.
Getting local help
The Greater Toronto Water Garden & Horticultural Society describes itself as a club for water gardeners or "ponders," open to beginners, advanced hobbyists, and professionals. Its meetings include knowledgeable speakers, a question-and-answer session, a plant table, and refreshments, and some meetings are held at a nursery or a private water garden — useful if you want to see working ponds before building your own.
Membership is per calendar year: $20.00 for a single membership or $25 for a family membership, which covers two people in the same household. The club can be reached by email, and directions to the Banbury Community Center are on its Contact Us page. It is one of over 270 societies in the Ontario Horticultural Association, District 5.
A realistic starting sequence
- Site it. Pick a spot with the light your chosen plants need and away from where lawn chemicals or roof runoff would drain in.
- Size it. Decide volume first — it determines pump, filter, and fish capacity.
- Build the basin. Liner or preformed, with edges secured against soil washing in.
- Add circulation and filtration. Pump and filter matched to volume and fish load.
- Plant. Lilies and hyacinth for surface coverage and nutrient uptake.
- Stock fish last. Let the water settle and the filter establish before adding fish.
- Plan for winter. Decide whether you need a heater based on whether you overwinter fish.
- Verify. Watch for green water, which usually means too much light and too many nutrients — more plant coverage and better filtration are the usual fixes.
Common sticking points
- Sizing too small. A pond that looks generous empty fills up fast once plants and fish go in.
- Skipping filtration. Still water with fish needs biological filtration, not just a pump.
- Ignoring winter. Cold-climate ponds need a plan for ice and fish survival.
- Planting before the system is stable. New ponds go through a green-water phase; plants and filtration bring it back into balance.
If you would rather learn from people who have already made these mistakes, a local society meeting is a low-cost way to see working ponds and ask questions directly.