Koi pond builders and water feature care, Los Angeles to Phoenix
Design, construction, maintenance, repair and leak detection for homes, HOAs, hotels and commercial properties across Southern California and Arizona. Based in Orange, CA since the 1980s.
Start with an on-site assessment
A technician tests the water, checks every piece of equipment, and tells you what the feature actually needs: a monthly visit, a one-time clean-out, a repair, or a rebuild. Written findings, fixed-scope pricing, no pressure.
- Reply within one business day
- Orange County visits within days; routed service across Southern California
- Emergency aeration for maintenance clients
- Property managers: COI, W-9 and board-ready reports
Prefer to talk? (714) 613-0123 · Mon–Fri 8–4, Sat 9–5
Everything a water feature needs, from the first sketch to the monthly visit
Most pond problems are system problems: filtration that's too small, a pump sized for the wrong head height, a liner edge that settled. We build, care for and repair the whole system, so you call one company. Whether you're searching for a pond contractor, koi pond company, water feature contractor, fountain repair service or lake management company, this is the work we do. Koi Pros is the koi pond and water garden arm of Lake Management Inc, based in Orange since the 1980s.
Design & build
New ponds, waterfalls and fountains engineered to run quietly for decades, and renovations that fix what the first builder skipped.
Care
Scheduled maintenance, clean-outs, algae control and lake management, with written reports for homeowners and property managers.
Repair
Pumps, filters, liners, plumbing and electrical, plus methodical leak detection so you only fix what's actually leaking.
Forty years of ponds, waterfalls, fountains and lakes
Design and build, scheduled care, and repair, by the same crew. Start with an on-site assessment.
For homeowners
Backyard koi ponds, water gardens, pondless waterfalls and courtyard fountains. We'll tell you whether your pond needs a monthly visit, a one-time clean-out, or a renovation, and we won't sell you the biggest option.
Book a residential assessmentFor property managers and owners
HOA lakes and entry fountains, hotel lobby ponds, apartment courtyards, golf course lakes and office-park water features. Scheduled service, photo reports for the board, emergency dispatch and phased reconstruction.
Commercial services
Check out Koi Pros projects
One minute of koi ponds and water features we've designed, built and maintain: the finished work, the rebar and plumbing underneath, and the upkeep that keeps them clear.
Recent work
Ponds, waterfalls and fountains we've built or brought back across Orange County, Los Angeles and the desert.
Watch a repair and reseal, start to finish
A leaking community stream and waterfall, start to finish: drain and vacuum, grind and patch the cracks, spray the sealer, refill, and the waterfall running again. About two minutes.
Customer story
Victoria's raised koi pond in Garden Grove
“My son found Wes with Koi Pros online, and Wes built this above-ground fish pond for me. It's come out very nice. Every day my husband will come out here and relax and sit by the pond and enjoy the sounds and beauty of the Japanese-style koi pond Wes built for us. We also use it to water our plants with the fish waste, and our plants are very beautiful because of that. We are very pleased with Wes and his team.”
Victoria, homeowner for 30 years, Garden Grove, CA
Victoria has lived in her Garden Grove home for 30 years. Her son found Koi Pros online, and Wes built a raised, Japanese-style koi pond with a waterfall for her backyard. Her husband sits by it every day, friends come over to see it, and the fish water feeds the garden.
How a project runs
The same four steps whether it's a backyard pond or an HOA lake.
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Assess
On-site visit. We test the water, check every piece of equipment, and find out what you actually want from the feature.
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Plan
A written scope with a fixed price, or a service plan with a visit schedule. No surprises on the invoice.
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Build or service
Our own crews, our own equipment, fish held safely on-site when the work needs the pond empty.
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Report
Water readings, photos and what to watch for next. Property managers get it in a format the board can read.
Pond care guides from the crew
What goes wrong with ponds in Southern California, what it costs, and what to do about it.
Maintenance · 24 min
Annual Pond Maintenance Calendar for California Ponds
Annual pond maintenance calendar for California's year-round climate. Monthly tasks covering water chemistry,...
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...
Maintenance · 19 min
Pond Water Quality Parameters: Testing and Management Guide
Pond water quality parameters include pH, ammonia, nitrite, nitrate, KH, GH, dissolved oxygen, and temperature....
Where we work
Routed maintenance across Orange County, Los Angeles, the Inland Empire, San Diego and the Coachella Valley. Construction and commercial crews travel to Arizona.
Questions we get asked
Do you handle both residential and commercial water features?
Yes. The same crews that build and service backyard koi ponds maintain HOA lakes, hotel display ponds, apartment courtyard fountains and golf course lakes. Commercial accounts get scheduled service, photo reports and priority dispatch.
What areas do you cover?
Orange County is home base. We run routed maintenance through Los Angeles, the Inland Empire, San Diego County and the Coachella Valley, and send construction and commercial crews to Arizona.
How does an assessment work?
A technician visits, tests the water, checks the pump, filtration, plumbing and electrical, and talks with you about what you want from the feature. You get written findings and a fixed-scope quote or a service plan.
Can you fix a pond someone else built?
That's a large part of our work. Renovation keeps what's sound and adds what was missing, usually bottom drains, properly sized filtration and service access.
Do you move and hold koi during work?
Yes. Every clean-out, reseal and renovation includes aerated holding tanks on-site, and we offer off-site holding and transport for longer projects and household moves.