Indoor ponds for Koi are beautiful and can enhance an indoor space like nothing else. But, they face a set of challenges that an outdoor pond does not. When attempting to set up indoor ponds for Koi, several environmental problems must be taken care of in order to have a pond that will not only live, but thrive.
Sunlight and Temperature
Outdoor ponds have the advantages of natural sunlight, which not only allows the ponds plants to grow, but helps the Koi maintain their coloration. With indoor ponds for Koi, the sunlight they receive will be filtered through windows, door or skylights.
The amount of sunlight should be optimized, and the pond built where there will be the maximum amount. Florescent lights will keep some species of pond plants alive, such as Taro, but will not be enough light to keep the entire pond in good health.
Metal halide lamps are useful for ponds that are 16 inches deep or more. They provide a much more intense light source than florescent lights, and the focus of these lights on the water is considered to be much more attractive in indoor ponds for Koi. When stocking the pond with plants, the lighting needs of each plant should be considered.
The normal indoor temperature of most homes is sufficient for Koi and most pond plants. If indoor ponds for Koi are placed in the basement of a home, an aquarium heater may be needed to keep the temperature steady year round.
Filtration and Water Changes
Indoor ponds for Koi should be treated much like an aquarium when it comes to filtration, and less like an outdoor pond. An outdoor pond may have an odor to it that escapes in the breeze, but an unfiltered pond in the home may begin to smell.
Pump and filtration systems can be both noisy and unattractive, and many pond owners choose to keep the systems in the garage, with filtration lines running to the pond. With an indoor pond, either an aquarium or a pond pump and filter will be effective.
In addition to an adequate filtration system, indoor ponds for Koi need to have frequent water changes. The frequency of the water changes will depend upon the amount of fish and plants that live in the pond. A large indoor pond with 10 to 15 Koi may need a weekly water change of about 50 percent.
A smaller and less populated pond may need only a 20 percent change weekly or twice monthly. Experimenting with water changes and noting how clean the water is and how the odor of the pond is a good way to establish a water change regimen.
Changes to the Environment Around the Pond
When indoor ponds for Koi are built in a home, more than just the pond area needs to be considered. If the pond is large enough, the moisture level in the house can rise, creating a ripe environment for mold. A dehumidifier is a good way to keep the moisture located to only the pond area, and not the floors and walls.
The area around a pond should also be outfitted for the occasional jumping fish. Having a good netting system around indoor ponds for Koi is ideal for keeping the jumpers off the floor.
Some pond owners prefer a low Plexiglas wall to be built around the pond. Depending on the size of the pond and the budget in question, either is an effective means of keeping the fish where they are supposed to be- in their healthy and thriving pond.