Hi everybody. Cool forum. Lots of good reading. Im Jason. I have had a 150 gallon preformed pond and a 250 gal preformed pond in the recent past but it wasnt enough. This summer i dug a pond that is about 8'x9' and steps down from 1' to 2' to nearly 5'. Rough estimates put is at about 1500 gallons. I have about 30 goldfish in it, all less than 2 years old. I also have 2 koi which are all less that one year old. Oh and there are a few frogs that have shown up as well. This is not a super fancy pond but i think it turned out ok for my first try. I have a 1300 gph pump near the bottom and what i thought was going to be inadequate filtration that i was going to have to increase. Turns out with a bunch of plants and mostly small fish, i didnt have any issues this year. I really enjoy this pond a lot.