Help! I have an above ground vinyl pool...18ft. round, 4 ft. deep. Everything had been going fine, until vacation. Upon returning, my water was green. I followed all the books that came with my pool and added algaecide, scrubbed, vacuumed and shocked. Now, my water is no longer green, but it is very cloudy and when I change the filter (cartridge), which I have been trying to do daily or every other day, it has a whitish(is that a word???) film on it. I really would love to have clear water to swim in as this is the hottest stinkin' weather we have had all summer! Any advice??? I know it takes patience (read other posts) but I have been working on this for over two weeks now. (whiner here, I know) 
