I haven't been on any for years but pond forums are a little different I think. You have everything from people running heavy equipment and building and stocking large fishing ponds and all of what goes along with that, to simple garden planter container ponds, and everything in between. Also just kind of by their nature a lot more discussion around construction and design on one hand, then on a completely other side things like how to grade koi. Usually the same forum not really being the better for both. So you need to kind of hone in more on exactly what you're interested in, what size/type/stage of a pond, etc.