We have a 3000 gal pond in full sunlight. it has a skimmer, two mesh filters and a 2400 GPH pump that pushes water up to our waterfall. In the waterfall weir we have bio balls. There are 12 water lillies although they only cover about 35% of the surface. There are two peat pellet bags hanging in front of the skimmer and a barley float about 12 inches square. We cleaned the pond this spring, pressure washed it in fact. Added bio-sludge when we filled it. We have had the pond for four years and have always had soupy green water - can only see about 1 or 2 inches down - barely. We have about 40 goldfish, and if I could see to catch them I would get rid of at least half. We have been feeding about 1/2 cup of fish pellets per day, but someone on the chat line suggested we stop feeding them, so we will do that. Two or three days ago we added a 40 watt uv pondmaster light in the line between the pump and the water wier, it has not made any difference yet. Due to evaporation we add an inch or two of water every other day. Thank you for any help you can give me.