Well, I'm digging a big hole in my yard
I've gone through various designs and filtration plans.
The original design dubbed the "Manta Ray" was beautiful and lovely...but due to various factors we decided against going all out.
In the end, we decided to go with a rectangular pond.
12' x 20' x 6' which I think is roughly 10K.
Similar filtration set up, although only one skimmer.
Depending on how the digging goes it may end up smaller.
I guess we'll see....
The Manta Ray Design: