Ecosystem koi pond built by Scott Anderson Design in Bellmore, New York

Water Feature Guide

Which Pond Is Right for You?

Choosing the Right Water Feature

Ecosystem Pond vs. Koi Pond vs. Pondless Waterfall

Three of the most popular water features we install on Long Island look similar from the outside but serve very different purposes. Before we design anything, Scott sits down with you to understand how you use your yard, who uses it, and what kind of relationship you want with your water feature. This guide lays out the honest differences.

Side by Side

Quick Comparison

Ecosystem Pond

Starting Cost
$9,000+
Maintenance Level
Low, self-balancing ecosystem
Fish-Friendly
Yes, goldfish and koi
Space Required
Medium, 7 x 9 ft minimum
Child Safe
Use caution
Best For
Natural look, wildlife habitat, casual fish

Koi Pond

Starting Cost
$10,000+
Maintenance Level
Medium, fish require attention
Fish-Friendly
Yes, optimized for koi
Space Required
Larger, 11 x 16 ft recommended
Child Safe
Use caution
Best For
Serious koi collectors, hobbyists

Pondless Waterfall

Starting Cost
$6,000+
Maintenance Level
Very low
Fish-Friendly
No standing water
Space Required
Small, fits tight spaces
Child Safe
Yes, no open water
Best For
Sound and beauty, minimal upkeep
Option 1

The Ecosystem Pond

An ecosystem pond is designed to function as a self-sustaining miniature environment. Biological filtration, a biofalls filter and skimmer, aquatic plants, fish, and beneficial bacteria work together to keep the water naturally balanced, with very little intervention from you. This is the type of pond we install most often on Long Island because it delivers the full visual impact of a natural pond at the lowest ongoing maintenance burden.

Ecosystem ponds support goldfish and koi, attract wildlife, and can include waterfalls, streams, and planting shelves. They are designed to look like they belong in a Long Island backyard, not like a hole in the ground with a liner. Learn about ongoing pond maintenance.

Option 2

The Dedicated Koi Pond

A dedicated koi pond is optimized specifically for keeping large, high-value koi. Compared to a standard ecosystem pond, a koi pond typically has a higher water volume, deeper with more square footage, more aggressive filtration, and is designed with fewer aquatic plants, because koi will eat most plants and their bioload is heavier than goldfish.

If you are a serious koi hobbyist who wants to collect premium fish, a purpose-built koi pond is the right choice. If you just want fish in your pond as part of the landscape experience, an ecosystem pond with koi does the job beautifully and costs less to build and maintain.

Long Island's Zone 7 climate means koi can overwinter outdoors safely if the pond is at least 18 to 24 inches deep.

Starting at $10,000.

Explore koi ponds.
Option 3

The Pondless Waterfall

A pondless waterfall delivers all the sensory experience of a water feature, the sound of moving water, the visual drama of cascading falls, the natural stone composition, without any exposed standing water. Water circulates from a hidden underground basin up through the waterfall and back down, continuously.

Pondless waterfalls are the ideal choice for families with young children, homeowners with smaller yards, or anyone who wants the lowest-maintenance water feature Long Island can offer. There are no fish to feed, no pond to balance, and in most cases the system can simply be shut off for winter.

We install pondless waterfalls from compact 3-foot patio features to dramatic 18-foot multi-tiered installations.

Starting at $6,000.

Explore pondless waterfalls.

Not Sure Which Is Right for You?

Schedule a free on-site consultation. Scott will walk your property and recommend the right fit for your yard, budget, and lifestyle.