We actually don't have a pump or filter. Just a buried stock tank with a sink drain installed in the bottom and plumbed out to a larger pond. We plan to collect rain water from the gutters so water changes can be frequent. A filter system would be a great addition though. . if we could figure out a good way to do it.If they're laying, Layena is fine for them, or just go with Purina Flock Raiser, but make sure you have oyster shell on the side... as for the pond pump and filter, I would talk to @shawluvsbirds she has a nice, small setup...