Hi- I am new here and I have a 18x 48 intex metal sided pool. Within two days of setting it up it turned a shade of green. I went to the pool store and they told me I had algea, to put two gallons of liquid chlorine in and keep the levels high for 2 days or so and it should filter through. My water is super clear, but green and there is no visible algea or dirt in the pool. Does it usually take longer than two days to clear up? It is sort of a lime green tint now. It just feels like nothing is changing.