Just purchased my first house, and it came with a pond in the backyard. The pond has been sitting there with no maintenance for who knows how long. It is full of leaves and sticks and has a bad smell. I want to clean it up but I'm new to all this so I don't know where to start. The pond is approx 5' wide X 5' long X not sure how deep because it is so mucky I can't see the bottom. It looks like it has a cement liner. There is a waterfall at one end of the pond, and the pump is working. I don't think it has a filter, or at least I can't see anything else besides the pump. I figured I will neeed to rent a sump pump and get rid of the old nasty water, clean it, and fill it with new water. After that I feel clueless. I thought getting some advise from someone who is familiar with all this would be good place to start. I will say I have some knowledge of water quality and bio filters ect. from many years of being an aquarium owner; however a pond seems so large I feel a little intimidated. Any advise would be appreciated. Thanks. :razz: