I recently purchased a home that has a pond located in the back yard. After one year of trying to maintain this pond I quickly found out how much of a pain it was. For one it don't have a skimmer and for two there isn't any filtration other than the pump that pumps water into a higher level and filters through a waterfall. The sellers simply had a Rubbermaid tote with the pump inside the tote. With lava rocks surrounding the pump inside the tote and holes drilled in the totes. Now my question is what would be the best and easiest way to add some filtration to this pond without having to redo the whole pond? Please help I can't deal with another year like last. It was a horrible pain.!