Keep the width of the pond 13 feet (4. 0 m) or under, as otherwise, it will be difficult to catch the fish using a net if you need to.
It’s important that the pond is a minimum of 3 feet (0. 91 m) as this makes it less likely to fully freeze over during winter. [3] X Research source Once you have determined the size and depth of the pond, you will be able to calculate the estimated volume. To calculate the volume of the pond in cubic feet, multiply the depth by the width by the length. To calculate the volume of the pond in gallons, multiply the volume in cubic feet by 7. 5. You will need these volume measurements for the upkeep of the water quality in the pond. A lot of birds and turtles like fish. So you should be careful. To prevent turtles and birds from wiping out all the beautiful fish, make sure the pond is deep enough so the fish can hide and make hiding spots at the bottom. You can put masonry blocks or something with holes where they can hide.
Some people like to have a koi fish pond located close to their home and viewable from a window, while others prefer to have the pond set back into the garden so that you can take a walk to reach it.
Koi ponds are often rectangles, L-shaped polygons, or irregular, round shapes.
The widest part of the pond is at the top.
Remove any sharp rocks or stones that you see in the hole before you lay the liner to prevent the liner from being damaged. A liner in one piece will prevent the pond from leaking.
The end result will look like a small ridge running along the entire outline of the pond. The ridge will be just beyond the rocks along the edge. This prevents rainwater, soil, lawn chemicals, and grass clippings from reaching the pond water.
Contact your water supplier if you are unsure about the water quality. Chlorinated water is toxic for fish such as koi. [12] X Research source
It is a common problem to have dissolved nutrient levels that are too high. Avoid overfeeding the koi and overstocking the pond, and change the water gradually if necessary. If you need to change the water in the pond, do it in amounts of 10% to 20% of the total volume. Otherwise, the fish may go into shock. [14] X Research source
Koi can survive in water that is 34–90 °F (1–32 °C), but they do best at 65 °F (18 °C). Never change the water temperature of the pond all at once, as this can cause the koi to go into shock which can be deadly. [16] X Research source
Set up the filtration system box right next to the koi pond. Dig it into the ground slightly. Install the individual parts in the pond as per the installation directions. The settling chamber makes it easy for you to remove debris from the pond to keep it clean. An ideal settling chamber size for koi fish ponds is 40 in (1. 0 m) deep and 40 in (1. 0 m) in diameter. The mechanical filtration part of the system will catch debris as it floats through the water. Biological filtration is the addition of beneficial bacteria into the pond. This reduces the levels of ammonia and nitrite in the water which are toxic for koi.
A pond aerator is an ideal and economical substitute for a pond heater. The size of the pond aerator that you need depends on the size of your koi pond. Know the volume, shape, and depth of your koi pond before you purchase an aerator and choose one that is designed for the size of your koi pond.
After the koi have been given time to adjust, open the plastic bag again and release them into their new pond. Don’t let the plastic bag float continuously in direct sunlight, as this could cause the koi to overheat. Place a towel over the bag if there isn’t a shady spot.
