ok - here's an update. Saturday morning my pool was Army green. I poured in 4 bottles of 6% and the pool immediately turned popcicle green. Sunday added 3 more bottles of 6% and pool gradually because a much lighter green, almos murky white. Flushed the filters that were just full of green algae. Monday added 2 bottles in the a.m. - Tested the water and we were at 2 ppm. Added 2 more Monday evening - the water is now a very pretty lite turquoise/white. Tested this morning and from the cheapie tester I have - looks like CL is 5 ppm. For kicks I checked the ph and it's at about 7, which is good because I fought a very high ph last year because of all the algae. I can now see my top step in the shallow end and the water is clear about 2 inches below the tile. I can make out the shelf in the deep end - it's about 2 ft down, so we're definately making progress. It's hard to know how much CL to put in the pool because my tester only goes up to 5ppm. Guess I need to buy another one now that I have a little more knowledge, but would really like to wait to get the one you all talk about here. Problem is it's not available until the end of this month and I would like to get this fixed by this weekend. Any thoughts? Should I call a pool maintanence guy and have them take over? Thanks again!