
Stream & ecosystem
ponds, self-balancing.
Meandering natural streams and true ecosystem ponds with bog filtration, aquatic plants, and biological balance.
Details that separate
good work from great.
Meandering stream
Multi-drop stream with pool-and-riffle grading — sounds like moving water, not a hose.
Bog / wetland filter
Planted bog filter polishes water biologically — clear pond, less mechanical filtration.
Native aquatic plants
Water lilies, iris, pickerel, and marginals matched to your exposure and hardiness zone.
Boulder character
Real boulder placement — not veneered stone — for a natural, aged look.
Five steps. One crew.
A cohesive process engineered for durability and professional delivery.
- 01The Discovery
Free estimate
On-site measure, scope, and written proposal — no pressure, no upsell.
- 02The Blueprint
Design & materials
Layout, samples, and finishes confirmed before we mobilize.
- 03The Logistics
Build
Our own licensed crews — no subs — on-site daily until it's done right.
- 04The Build
Walk-through
Punch list closed, site cleaned, and written workmanship warranty issued.
Answers before
you call.
01What's the difference between a koi pond and an ecosystem pond?
What's the difference between a koi pond and an ecosystem pond?
Koi ponds are fish-first: deep, heavily filtered, minimal plants. Ecosystem ponds are plant-first: shallower zones, bog filtration, mixed fish and native plants.
02Can I run a stream without a full pond?
Can I run a stream without a full pond?
Yes — stream-only builds discharge to a hidden basin (pondless), giving you the sound and motion without the open water.
Stream & Ecosystem Builds across
all of Suffolk County.
Serving Long Island's South Shore and central corridor. Licensed, insured, and locally owned — 30+ years building for the towns listed below and every Brookhaven and Islip neighborhood in between.
- Stream & Ecosystem Builds in Medford, NY
- Stream & Ecosystem Builds in Bellport, NY
- Stream & Ecosystem Builds in Patchogue, NY
- Stream & Ecosystem Builds in Holbrook, NY
- Stream & Ecosystem Builds in Ronkonkoma, NY
- Stream & Ecosystem Builds in Sayville, NY
- Stream & Ecosystem Builds in Blue Point, NY
- Stream & Ecosystem Builds in East Patchogue, NY
- Stream & Ecosystem Builds in Bayport, NY
- Stream & Ecosystem Builds in Farmingville, NY
- Stream & Ecosystem Builds in Selden, NY
- Stream & Ecosystem Builds in Center Moriches, NY
More Koi Ponds
work we do.
APM O'Neill & Sons
Your Dream Outdoor Living Space With Low Monthly Payments
Flexible Monthly Payments Available
Licensed & Insured · Free Estimates · Serving Suffolk County, NY

