Koi Pond Installation in Texas
Koi ponds built for the Texas climate. Deep enough for 100°F summers and the occasional hard freeze, filtered and aerated for a real fish load, and designed so herons and raccoons go home hungry. Craig McBride has been building ponds for 31+ years.
Published · By Craig McBride
Depth for Texas heat and freeze
Most failed Texas koi ponds are simply too shallow. Build at least 3 feet across the main body with a deep zone of 4 to 6 feet. Depth is thermal mass, which keeps water liveable through a run of triple-digit days and keeps fish below the cold during a hard freeze. Steep sides into the deep zone also deter wading birds.
Filtration sized for koi
Koi carry a deliberate waste load, so a koi pond needs a mechanical stage, skimmer and bottom drain into settlement or a sieve, to remove solids before they decay, plus biological media sized to the fish load to convert ammonia. Target roughly one full turnover of pond volume per hour.
Aeration
Warm water holds less dissolved oxygen exactly when fish and bacteria demand most, so dedicated diffused aeration is not optional in Texas. We size it for the hottest week of the year and place diffusers so the deep zone is never left stagnant, keeping a gas exchange hole open during freezes.
Predator protection
Herons and egrets from the air, raccoons at the edge and the occasional hawk are the realistic threats. Protection is designed into the pond: depth, steep walls, submerged caves or fish tunnels for cover, marginal planting to break sightlines, and netting or deterrents where pressure is persistent.
Koi pond or swim pond?
They are different builds. A koi pond is engineered around fish health. Gravel-free bottom, hourly turnover, stocked fish load. A natural swim pond is engineered around swimmable water. Planted regeneration zone, slower turnover, minimal fish. Where a property has room, two separate bodies of water beat one compromise.
Overview
Koi ponds built for the Texas climate. Deep enough for 100°F summers and a hard February freeze, filtered and aerated for a real fish load, and designed so herons and raccoons go home hungry. Craig McBride has been building ponds for 31+ years.
Depth: Texas heat first, freeze second
Most failed koi ponds in Texas are simply too shallow. A shallow pond in Dallas or San Antonio behaves like a warming tray in July. Water temperature climbs, dissolved oxygen falls, and fish are stressed before any disease shows up. Depth is thermal mass, and thermal mass is what keeps the water liveable through a two-week run of triple digits. The same depth handles the other end of the Texas year. Hard freezes are occasional here rather than seasonal, but they arrive fast and they do arrive. And a deep zone means the cold sits at the surface while fish hold below it. What matters in a freeze is keeping a gas exchange hole open, which is why we keep aeration running and never let the surface seal over completely. 3 feet minimum across the main body of the pond A deep zone of 4 to 6 feet as thermal refuge and predator defence Steep sides into the deep zone so wading birds cannot stand Shade from planting or a structure over part of the surface in hotter regions
Filtration and aeration sized for koi, not for swimming
This is where koi ponds and swim ponds genuinely diverge. A swim pond carries almost no deliberate biological load, no stocked fish producing waste, so it can rely on a large planted regeneration zone working slowly. A koi pond carries a stocked fish load by design, which means ammonia production every day of the year and solid waste that has to be physically removed before it decays.
Mechanical stage
Skimmer and bottom drain feeding a settlement or sieve stage, so solids leave the water instead of breaking down in it. This is the stage most DIY koi ponds skip.
Biological stage
High-surface-area media colonised by nitrifying bacteria to convert ammonia through nitrite to nitrate, sized to the fish load rather than to the water volume alone.
Koi pond or swim pond? Be honest about which you want
People often arrive asking for a koi pond they can also swim in. It is worth saying plainly: a pond built for a stocked koi population and a pond built for swimming are different projects, and trying to do both usually produces something that disappoints on both counts. If swimming is the priority, start with natural swimming ponds . Where a property has room, the best of both worlds is usually two separate bodies of water, a koi pond near the house to look at, and a swim pond beyond it.
Where we build koi ponds
We work from Allen, Texas across Texas , including Dallas , Fort Worth , Austin , Houston and San Antonio , plus Oklahoma, Colorado, New Mexico and Kansas.
Frequently Asked Questions
How deep should a koi pond be in Texas?
At least 3 feet across most of the pond with a deeper section of 4 to 6 feet. Depth keeps water temperature stable through 100°F stretches and keeps fish safely below the cold in a hard freeze.
What filtration does a koi pond need?
Mechanical filtration to remove solids plus biological filtration to convert ammonia, turning the whole volume over roughly once an hour, a much larger load than a swim pond's planted regeneration zone.
Do koi ponds need aeration in Texas summers?
Yes. Warm water holds less dissolved oxygen while demand peaks, so dedicated aeration sized for the hottest week of the year is essential.
Can you swim in a koi pond?
We do not recommend it. A koi pond's chemistry, waste load and gravel-free bottom are built around fish health. If you want to swim, build a natural swimming pond instead.
How do you protect koi from predators?
Depth and steep-sided deep zones, submerged caves for cover, edge planting to break sightlines, and netting or deterrents where heron and raccoon pressure is heavy.