Another one I didn't invent but I don't think any 3reef users have made one yet so I thought I would get it started. I built my first one 2 weeks ago and plan to built a few more in the coming week. I built a overflow, a few stands, rock racks, and even a calcium reactor but this is hands down one of the cooliest DIY projects I have seen. Basically you use a the good old bread and butter Maxi-Jet and replace the stock housing and impeller with a new housing and a propeller. I used the MJ1200 in the first one and it takes the stock 298gph MJ and jack it up to around 3000GPH. All still with the the same power usage. It really is amazing. I thought I would get started with a teaser. My version 1.0. Basically the does this thing work stage. In the next week or so I am going to post a how-to but I thought I would get you drooling first.