I have never in my life been tempted to do that hackneyed routine where you drop to your knees and moan "I'm not worthy", until now.
Amazing build and has me wondering how to reno the house to fit one. Of course I will have to say goodbye to the wife first 'cuz she would never stand for it.
I like your filter, I've built something similar for my 700 gallon koi tank in my backyard. You may find that polyester quilt batting will work better that the foam Matt. I tried several kinds of media in my filter until I tried quilt batting, that's all I use now.