It's all about filtration. A proper filter system is the key to a successful koi pond. Many factors must be considered when designing a filter system. All components must be coordinated to ensure proper function. The following components must be carefully planned before you even start digging:
- Pond gallons
- Pond shape
- Pipe sizes and configuration
- Filter components
- Pump flow rate
- Total Head Pressure
- Proper circulation
- Aeration
- UV Clarifier size
- Backwashing of waste
- Fresh water and overflow water
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SELF CLEANING POND SHAPES
Design your pond with straight walls and a sloping bottom. The vertical walls will not collect debris and they will also help keep predators out of the pond. Ideal water depth for a koi pond is 3 to 4 feet. The bottom should slope to centralized bottom drains. These drains will take the dirty water to your filter. Cement ponds can be vertical. Liner ponds may need an angled wall in order to prevent the soil from caving in. The liner wall can be a vertical wall for the first 18 to 24 inches depeding on the stability of your soil. The wall can then angle towards the floor to make up the additional depth needed to achieve 3 to 4 feet. If you want aquatic plants you may add planter shelves in various artistic locations. Make the shelves at least 18 inches wide so the plant pots will be stable. The shelves need to be about 12 inches deep for bog type plants. This will put about 2 to 4 inches of water above the pot. Lilies need to be in 18 to 24 inches of water. The diagrams below give some examples.
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