Reddog,
I found a a cheap trick that works to fight green water. Add Perlon (aquarium poly filter floss) to your mechanical filter. Take a large swab and switch it every day. It catches the tiny particulate that makes up the green water (even fine sponges don't catch it). A 1lb bag costs about $2 at any fish store.
As to pond visitors, I have had swallows come and dive bomb my pond (I believe they are barn swallows).
I found a a cheap trick that works to fight green water. Add Perlon (aquarium poly filter floss) to your mechanical filter. Take a large swab and switch it every day. It catches the tiny particulate that makes up the green water (even fine sponges don't catch it). A 1lb bag costs about $2 at any fish store.
As to pond visitors, I have had swallows come and dive bomb my pond (I believe they are barn swallows).
