I consider myself a Newbie, although I have had a very small goldfish pond with easy care fish and plants for about 20 years. I am now in the process of building my first Koi pond and have perhaps bitten off a bit much for someone my age (don't ask - LOL!). I'll be making a bio filter from a 150 gallon Rubbermaid water trough, have purchased a skimmer and a concrete retro drain. The basic digging is done! But it will take me a month or more to finish the pond. It will be a round, 5k gallon liner pond for a mix of butterfly and standard koi. I'm thinking about putting in a bog garden too. Maybe next year Looking forward to being part of this forum!