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Koi Pond Filtration & Waterfall Installation Service

154 views#3954
Listing period10 daysuntil 11.12.2026
Posted12.09.2026
Views15417 in 14 days

About the service

I design and install complete filtration systems and natural-look waterfalls for koi ponds and ornamental water gardens, sized properly to your actual water volume and fish load rather than a generic off-the-shelf kit. Every project starts with the numbers that matter: gallons of water, planned or existing koi biomass, surface area, and climate, which together set the pump flow rate, the biological media volume, and the mechanical pre-filter stage needed to keep the water genuinely clear year-round.

Scope of work covers the full chain — settlement or vortex chamber, mechanical bead or brush filtration, a properly sized biofilter with bio-balls, K1 media or matrix blocks, UV clarifier sizing to match flow rate (not just tank size), and skimmer placement so surface debris never reaches the bottom drain. I calculate turnover rate for the whole system so the entire pond volume passes through filtration on a schedule that actually supports fish health, not just a number on a pump box.

Waterfall and stream construction is built on compacted base, underlayment, and EPDM pond liner installed with proper overlap and pond-safe pipe penetrations — no leaks, no pinholes, no shortcuts on the liner seams. Rockwork is set to hide plumbing and create real aeration as water falls, which raises dissolved oxygen and helps the biofilter itself. Bottom drains and returns are placed to eliminate dead zones where waste would otherwise settle and rot.

Before startup I run a full water chemistry check — ammonia, nitrite, nitrate, pH, KH and GH — and I cycle new biofilters with beneficial bacteria before koi are ever introduced, so fish are never exposed to an uncycled system. Typical turnaround for a full filtration and waterfall build is 5 to 20 days depending on pond size and site access, plumbing complexity, and rockwork extent. I also service and retrofit existing ponds that are cloudy, algae-prone, or under-filtered — often the fix is re-sizing the biofilter and pump rather than replacing the whole system. Every job includes a written flow-rate and turnover calculation, a maintenance schedule, and a walkthrough on media cleaning so the owner can keep water quality stable long after I leave.

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Dmytro K.Engineering (Drawings / Diagrams)
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