I thought my pond building days were over...but apparently, I was wrong. I'm preoccupied right now building a 1,500-gallon holding (sale) pond in our backyard shed right now, but when I'm done, this is my next project. I'm still in the early planning phases right now, but hopefully, by Spring 2008, this will be the site of our second Koi pond. This grass area is approximately 20' X 15'. I'll be shooting for a maximum depth of 6', possibly raised 1' above-ground, with a total water volume of 6,000 gallons -- not including filtration. Gotta' put all these babies somewhere...(at least that's the excuse I'm using on the wife...)