Self Cleaning Koi Pond

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.