If the water hardness in your pond is low, you may need to supplement the water with calcium and magnesium to ensure the fish get the necessary nutrients.
Can koi fish live in soft water?
Yes, koi fish can live in soft water. While they are more commonly found in hard water environments, they are quite adaptable to different water parameters and can tolerate a range of water hardness levels. They can also tolerate a range of pH levels, between 6.5 and 8.5. However, it's important to note that koi prefer slightly alkaline, hard water, and they can become stressed in soft water or in water with a pH below 6.5.