Hello, I just installed a 24 ft round aboveground pool. It has a deep end and holds 17000 gallons. I had to use well water to fill the pool. It took several weeks to fill it. Towards the end I had a large film of pollen on the surface. I hooked up pump and filter as soon as water reached skimmer. The pump is a hayward extreme with a tube filter. Within an hour all signs of pollen were gone except for a little on walls. Within an hour of running pump the water started turning green. The first test I did had no trace of any chemicals. Using aquachems online tester I started balancing the water. I first added chlorine and extra blue shock. I then added the other chemicals. All my readings are good now but I still have a dark green water. It is clear on top. I can see down about 8 inches. Tonight I added one bottle of 50% algicide. I immediately saw white particles come to top of water. After a few hours I still can not see a difference in color. I'm not sure if I need to add more or if I have problem with metal in water. I was thinking no on the metal issue since it started to turn green before any chemicals were added. The nearest place I can get water tested is thirty miles away. Any help will be appreciated.