ok so i live up in northern nevada and just got a new house. i was thinking of building up a pond in the back. anyone have any tips on materials to use. whats the smallest you would go with? its an average size back yard but cost is obviously a factor. im not expecting it to actually get ducks even though i would love for that to happen. just want a place in the back that i can look at that makes me think of the ponds and get some birds to it.