Here's some more pics and the filtration. they aren't that detailed though. its raining.
Theres 4 large areas for the material to go in. kind of like a large sump. overflows into the next compartment and eventually into the pond. also there is the round barrel thing (forgot what it is called at the moment) with lots of bio material and lastly, 2 very long UV lights.
sorry for the late reply, havent been on for a while. Yes, the net is to keep the racoons and birds out. The bird flower isn't in the water, i dont think it will live if submerged.