I recalculated...took out the bog volume. There are about 8 really big koi. I've had them for 15 years. So it would be tough for me to re-home them. I'm not as attached to some of the others, especially the babies. I am looking for homes for the growing fry. I'm going to try to increase aeration, along with planting the bog. Thanks for your comment.Previous posts put pond at 2000 gallons. Not sure how many adult koi you have but rehoming some of the adults would help with water quality. Those big koi put out a lot of waste! As soon as things start getting a little more normal, my big boys will be going to new homes