Addy, you never added any fish besides the 4 that were in your pond this spring? WOW! Then those little buggers were really busy. LOL
I'm thrilled that my pond has remained crystal clear still. I am leaving mine up and running until another weekend, then will look at the weather and make the decision of shut it down for winter, or leave it going. Even though the fish are toward the bottom for the most part, I can see each and every one of them.
I still have those two small koi that lost their red coloration this summer, about a month or so after I got them, and still never colored back up. I got 7 koi from the same breeder, and the others have not lost any of their color. Some thought maybe the hot weather caused it, but I know it could have been lots of things. It's pretty much white now, and used to be tri-colored, and that was why I chose it. Oh well, you never know about color, if it will stay or not, so we shall see what happens come spring and warmer temps. Maybe it will return to it's full color pattern then.