KOI POND INSTALLERS · DESIGNERS · BUILDERS
Koi Pond Installers & Designers — NY, NJ & PA
The Hudson Valley's dedicated koi pond company since 1991
Looking for koi pond installers or a koi pond designer near you? Garden State Koi is a Certified Aquascape Master koi pond company designing, building, and stocking ecosystem koi ponds across Orange County NY, Rockland, Westchester, Dutchess, Sullivan, Ulster, North Jersey, and Pike County PA. Natural filtration, rockwork, and aquatic plants keep the water crystal clear so the koi thrive and you spend more time enjoying it than maintaining it.
THE CONCEPT
Why Homeowners Choose Our Koi Pond Company
Unlike traditional ponds that fight nature with chemicals and constant maintenance, an ecosystem koi pond works with Mother Nature. As koi pond installers and designers, we build a balanced environment where fish, plants, bacteria, and filtration work together to keep the water clean and clear — naturally.
The result is a low-maintenance, self-sustaining koi pond that becomes a habitat for wildlife and a peaceful retreat for you — backed by a koi pond builder you can call when you have a question.
THE ECOSYSTEM APPROACH
How It Works
Biological Filtration (BioFalls)
Beneficial bacteria colonize the filter media, breaking down fish waste and debris naturally.
Mechanical Filtration (Skimmer)
Surface debris is swept into the skimmer before it sinks, keeping your pond clean.
Rocks & Gravel
Provide surface area for bacteria to colonize and create a natural-looking bottom.
Aquatic Plants
Absorb excess nutrients, compete with algae, and provide shelter for fish.
Fish
Koi and goldfish add movement and color while helping control algae and insects.
WHY CHOOSE AN ECOSYSTEM POND
Benefits of an Ecosystem Pond
Low Maintenance — The balanced ecosystem does most of the work for you
Crystal Clear Water — Natural filtration keeps water clean without chemicals
Wildlife Habitat — Attracts birds, butterflies, frogs, and dragonflies
Year-Round Beauty — Stunning in every season, even winter
Relaxation & Stress Relief — The sights and sounds of water reduce stress
Increased Property Value — A professionally installed pond adds value and curb appeal
EVERY ECOSYSTEM POND INCLUDES
What's Included
TRANSPARENT PRICING
Pricing
Every pond is custom, but here's what to expect based on size:
Small Pond
Up to 6' x 8'
Starting at $9,995
Perfect for patios and small yards
Medium Pond
Up to 11' x 16'
Starting at $14,995
Our most popular size
Large Pond
16' x 21' and up
Starting at $24,995+
For those who want a showpiece
Pricing includes everything listed above. Add-ons like LED lighting, additional fish, and premium plants available.
What Affects Your Price?
↑ Increases cost: Longer streams, difficult site access (steep slopes, narrow gates), premium rock selection, LED lighting packages, additional fish
↓ Reduces cost: Shorter or no stream, flat and accessible site, standard rock package, minimal add-ons
ENHANCE YOUR POND
Popular Add-Ons
LED Lighting Package
$1,350 – $2,550
Enjoy your pond after dark with underwater and landscape lighting
Fish Package
$75 – $300
Start with healthy, quarantined koi and goldfish from our store
Auto-Dosing System
$399 – $599
Automatically treats water to maintain perfect conditions
Premium Plant Package
$150 – $520
Lilies, lotus, marginals, and floating plants
CLIENT REVIEWS
"Tom and his team transformed our backyard into something magical. The pond is the centerpiece of our outdoor living space now."
— Verified Customer, Orange County NY
COMMON QUESTIONS
Frequently Asked Questions
Helpful Reading
Helpful Koi Pond Guides
Costs, planning, and troubleshooting from our 33+ years installing ecosystem ponds across NY, NJ & PA.
Ready to Create Your Backyard Oasis?
Take our 2-minute quiz to get a personalized recommendation and see transparent pricing.
Find My Perfect Water Feature →Prefer to talk? Call us at 845-651-4100
Garden State Koi • 657 NY-94, Warwick, NY 10990 • Mon–Fri 9am–5pm