Building the best and fixing the rest · Mon–Fri 8–4 · Sat 9–5 · Orange, CA · Serving Southern California & Arizona [email protected]
Koi Pros

Rancho Santa Margarita pond builders, water feature care and leak repair

The Lago Santa Margarita area and Dove Canyon estates; hot, dry summers put a premium on aeration and shade planting.

    Request an assessment

    Tell us about the feature and where it is. We reply within one business day.








    Or call (714) 613-0123. No marketing emails; we only follow up about your request.

    Refilled turquoise community lagoon with beach club and umbrellas behind
    Lagoon refilled and reopened, Rancho Santa Margarita
    Panorama of a drained community lagoon with new white liner being covered in sand
    Lagoon relining underway, Rancho Santa Margarita
    Koi beneath water lilies in a formal gravel-bottom pond
    Koi and water lilies in a formal pond

    Pond and water feature conditions in Rancho Santa Margarita

    Every pond, fountain and lake is a small ecosystem that answers to local conditions. These are the ones that shape how we build and service water features in Rancho Santa Margarita.

    Tap water and fill water

    Santa Margarita Water District imported supply, chloraminated and moderately hard; recycled water irrigates most common areas.

    Heat, evaporation and wind

    Inland against the Santa Ana Mountains: summer highs near 90, strong Santa Ana winds, cool clear winter nights that can frost in Dove Canyon and Robinson Ranch.

    Soil, grade and excavation

    Graded pads over sandstone and clay; Dove Canyon and Trabuco Highlands sit on steeper, rockier ground.

    Predators and wildlife

    Coyotes, bobcats and raccoons from O'Neill Regional Park and Trabuco Creek; herons from Lago Santa Margarita.

    Black-crowned night heron holding a fish
    Night herons hunt after dark, when most deterrents are off

    Leaf and debris load

    Eucalyptus, pine and oak; fall wind events load skimmers overnight.

    Koi Pros crew setting rebar and plumbing in a pond excavation
    Rebar and plumbing going in before shotcrete

    Water features we build and service in Rancho Santa Margarita

    HOA lake and stream systems around Lago Santa Margarita, gated estate communities (Dove Canyon, Trabuco Highlands) with large ponds and waterfalls, and 1990s tract ponds throughout.

    Neighborhoods and communities we work in: Dove Canyon, Robinson Ranch, Trabuco Highlands, Las Flores, Melinda Heights.

    Residential pond, waterfall and fountain services

    Design and construction

    Scheduled care

    Repair and water loss

    Commercial water feature services in Rancho Santa Margarita

    Property types

    Lake and large-feature programs

    How Rancho Santa Margarita service is scheduled

    Rancho Santa Margarita is inside our Orange County home route. Assessments, repairs and maintenance visits are scheduled within days, and emergency aeration can be on-site the same day for maintenance clients.

    Local water features worth knowing

    If you want to see what balanced water looks like at scale before planning your own feature, Rancho Santa Margarita has good public examples nearby: Lago Santa Margarita; O'Neill Regional Park; Trabuco Creek. The same principles — depth, circulation, filtration sized to the biological load, and shade — apply to a backyard koi pond.

    Nearby cities

    Pond and water feature service in Rancho Santa Margarita

    Koi ponds, waterfalls, fountains and lakes, built and cared for by crews based 30 minutes away in Orange.

    Work in Rancho Santa Margarita

    See more pond, waterfall and fountain projects

    Pond care guides for Rancho Santa Margarita owners

    Maintenance · 8 min

    Signs Your Pond Needs Professional Cleaning Services

    Learn the key signs your pond needs professional cleaning services, from murky water to algae growth. Keep koi...

    Maintenance · 7 min

    How to Clean Green Water in Your Pond

    Struggling with green water in your pond? Learn proven tips to clear algae, improve filtration, and restore clean,...

    Maintenance · 19 min

    How Much Does Pond Maintenance Cost in 2026?

    Pond maintenance costs $450 to $5,000 per year depending on pond size, type, and service frequency. Breakdown by...

    All pond care guides

    Check out Koi Pros projects

    Koi ponds and water features we've designed, built and maintain across Southern California, from the crews that serve Rancho Santa Margarita.

    Pond service questions from Rancho Santa Margarita

    Is Rancho Santa Margarita tap water safe for koi?

    Yes, after the chloramine is treated. Keep recycled irrigation water away from the pond.

    Why does my Rancho Santa Margarita pond turn green every summer?

    Summer highs near 90 and wind-blown eucalyptus, pine and oak debris feed algae. Filtration, UV and prompt cleanups after wind events keep it clear.

    What's eating the fish in my pond?

    Coyotes, bobcats and raccoons come out of the regional park and along Trabuco Creek, and herons fly over from Lago Santa Margarita. Steep walls and a covered refuge protect koi.

    How much does koi pond maintenance cost here?

    Fall wind events can fill skimmers overnight, so we sometimes add cleanup visits; pricing follows a first visit.

    Do you build new koi ponds locally?

    Yes; most pads are sandstone and clay, while Dove Canyon and Trabuco Highlands are steeper and rockier, which affects excavation.

    Pond or fountain in Rancho Santa Margarita?

    Schedule an on-site assessment. We'll test the water, check the equipment and tell you what it needs.

    Call Request assessment