Hey fishin4cars! Thanks for the welcome. Our pond is about 6,500 gallons. We have 12 koi, 3 fan tails, and about 14 comets. It seems like a lot, but they have a great amount of room to move around. We try not to over crowd them.
My girlfriend gives our fish names. Our biggest fish is named Goldie (he's the yellow one in the picture). He is about 18-20" long now. We've had him from the beginning.
We are running this big bio filter with a skimmer that we bought from Garden State Koi. We also have UV lights. We tried this thing called the IonGen, but the fish seemed like they didn't like it. It made them move pretty slow and it was set on low. As soon as we turned it off they started to act like their old selves.
This morning we started working on a homemade bio filter. My dad looks on this forum and saw Dr. Daves design and read about the great results it gives. (Thanks Dr. Dave!) So now we are going to run our regular bio filter along with Dr. Daves. Our water quality is always good, but we figured why not try to make it clearer.
Here is some pictures of our pond and the filter we are working on: