When are you going to build the bog. ?
I've already started! In fact, earlier today I sent an email off to the roofing fellow from whom I bought the pond liner to order a 6 x 4 meter piece of 60 mil liner, plus some underlayment. Hopefully, he'll have it in stock.
I've begun digging the hole for the bog, and will need to figure out how to create the walls. I had originally thought to use cinderblocks, but then I had a rather diabolical idea...there's an old electrical pole from the early 1980s sitting just adjacent to our property in the vacant lot next door. Once upon a time, the pole held the security lighting for the perimeter road around our town, but the security road has long since been moved down the hill, and the pole hasn't been connected to anything in over 20 years. It will eventually just be left to decay on its own, as the municipality isn't going to invest resources into tearing it down.
But then there's this crazy old grandma with a chain saw... I figure that pole would furnish me with about a dozen sturdy wooden cylinders that would make a great surround to a bog filter! See anything wrong with this plot (er, plan)?
Or are you waiting to see how the pond does without it for now.
So far, it's stayed beautifully clear and free of algae without the bog. But since we've just inherited this rescue koi, I think the time has come to get the bog done.