I have been reading obsessivly on this forum since I found it yesterday and my mind is swimming with all the information. I kept running into skippy filter and found a link so went to the website but I'm still not sure what it is. Is it a large rubbermaid tank filled with media that then flows into your waterfall and into the pond? Do you build around it so you don't see it? Is it plumbed into your waterfall or just have an overflow into it? My pond is 3000 gal so what size tank would I need? I'm thinking I could do this!