I haven't been on here in a long time, and found out recently that I've been missing out on a lot of valuable garden pond advice. I live in the woods of the Hocking Hills area in SE Ohio. My Husband and I have a 44,000 gallon mud pond. We have had it for almost 5 years and it is still evolving, as we are constantly adding and dividing plants. I found that I cannot use a pressurized filter as it will just load up with mud. I have the pond aerated and our 1st group of Koi are at least 15 inches long and having offspring. We love the peacefulness and tranquility of having a pond. We are now thinking of making a bog pond in another part of the yard. I'm looking to purchase a new pump and really appreciate any recommendations you want to make.