By all means, get as much muck up off the bottom of your pond as you can. Netting the pond will keep the leaves out but it's generally something I only do in the fall because it lessens the beauty and enjoyment of the pond. MicroLift Sludge Away is a great product, follow the directions and use routinely and it will help with the muck problem. A word of warning: Sludge Away is a dark brown and will temporarily tint your pond water brown; this usually only lasts a day or two however. Next, increase the density of your filter pad(s). I recommend the light green pad for "polishing" the water. It will capture the smallest particulate matter in the water and in a few days your pond should be drinking water clear. Another word of warning; the light green pad will capture so much debris you may need to rise out the pad in a few hours when using it. Time will let you know when and how often to rise it. When I use mine, I need to pull it out after about 6 hours. After the pond is cleared you can return to using your regular filter pad and only use the "polishing pad" as needed (one a week possibly).