<human>:  What steps do I need to take to build a koi pond?
<bot>: 
1. Select a suitable location for your pond that is level and away from direct sunlight.
2. Calculate the size of your pond, considering the number of fish and type of plants you plan to have.
3. Dig a hole at least 24 inches deep and line the sides with a water-permeable barrier such as rubber or plastic liner.
4. Install electrical/water pumps and filtration systems as needed.
5. Place stones and gravel at the bottom of the pond for the fish to hide and for plants to thrive.
6. Fill the pond with water and let it sit for a few days to help the water balance itself.
7. Test the water for pH and other levels and adjust accordingly.
8. Introduce your koi fish to the pond.
9. Plant water plants in the pond to help purify the water and provide natural food sources for the fish.
10. Regularly monitor and maintain the water parameters, pond size, pH and other levels and remove any rotting plants or debris.