algae attack

Dear Spa Guru, I wanted to Thank you for your help in cleaning up our pool. We really appreciate your time and knowledge. We followed your instructions and won the fight against the algae. Thank you again! We truly appreciate it!

How do I obtain an accurate CYA reading? Did I understand correctly; if the CYA is that high I should drain 8 inches OR Vac to waste?

Thank you for your response Is there a brand of polyquat algaecide that you recommend? How much liquid chlorine should I add? (Leslies told me I cannot use liquid chlorine because of the liner..is that correct?

Please help!!! I have been unsuccessfully fighting algae for over a month. I have a 10,000 gallon above ground, vinyl lining pool with a cartridge filter. My pool was left open in the winter with the pump running for 8 hours everyday and minimal chlorine. After the cold months in preparation for swimming season I brushed the floor & walls of the pool; it immediately turned completely green. Also, I replaced the cartridge in the filter. My water tests results are as follows: April 4, 2010 Free Available Chlorine = 0 Total Available Chlorine = 0 Water PH = 7.2 Total Alkalinity = 100 Cyanuric Acid = 60 Total Dissolved Solids = 1000 Copper = 0 Iron = 0 Phosphates = 700 Pool water was green! Leslies recommended 2 lbs. of Green to Clean, wait 5 min. Then add 1 lb shock. Wait 12 hrs then add another 1 lb. of shock. Wait 12 hrs. Then add another 1 lb of shock. All this while the pump ran 24 hrs. April 8, 2010 Free Available Chlorine = 0 Total Available Chlorine = .0 Water PH = 7.2 Total Alkalinity = 100 Cyanuric Acid = 140 Total Dissolved Solids = 980 Copper = 0 Iron = 0 Phosphates = 350 Pool was green! Leslies recommended again 2lbs. of Green to Clean, wait 5 min. then add 2 lbs shock. Wait 12 hrs. Then add another 2 lbs. of shock. Wait 12 hrs. Then add another 2 lbs. shock. April 16, 2010 Free Available Chlorine = .5 Total Available Chlorine = .7 Water PH = 6.2 Total Alkalinity = 26 Cyanuric Acid = 270 Total Dissolved Solids = 1500 Copper = 0 Iron = 0 Phosphates = not tested Still green! So this test was done at another pool store. They recommended that I drain½ the pool and refill with fresh water, due to the cyanuric acid being so high. Then add 3 lbs. of shock. April 22, 2010 Free Available Chlorine = 0 Total Available Chlorine = .8 Water PH = 6.2 Total Alkalinity = 44 Cyanuric Acid = 242 Total Dissolved Solids = 1500 Copper = 0 Iron = 0 Phosphates = not tested Cyanuric acid still high and water still green! So they recommended draining the water ½ way again and refilling with fresh water. April 24, 2010 Free Available Chlorine = 0 Total Available Chlorine = 0 Water PH = 7.2 Total Alkalinity = 50 Cyanuric Acid = 150 Total Dissolved Solids = 700 Copper = 0 Iron = 0 Phosphates = 0 Back at Leslies and the waters still green! They recommend to add 1½ lbs. soda ash to get the ph up and wait 4 hrs. Then add whole bottle of Ultima algaecide. One bottle treats 20,000 gal. Wait 12 hrs. Then add 2 lbs. of shock. April 26, 2010 Free Available Chlorine = 1 Total Available Chlorine = 1 Water PH = 7.8 Total Alkalinity = 80 Cyanuric Acid = 150 Total Dissolved Solids = 700 Copper = 0 Iron = 0 Phosphates = 0 Still green! Leslies recommended adding recommended amount of Pool First Aid (6capfuls), wait 12 hrs and add 3 lbs. shock. April 28, 2010 Free Available Chlorine = 6 Total Available Chlorine = 6 Water PH = 7.9 Total Alkalinity = 100 Cyanuric Acid = 140 Total Dissolved Solids = 700 Copper = 0 Iron = 0 Phosphates = 150 Still green! Leslies recommended 4 lbs. of Fresh n Clear shock. Wait 12 hrs then add 8 capfuls of Pool First Aid. April 30, 2010 Free Available Chlorine = 1 Total Available Chlorine = 1 Water PH = 7.6 Total Alkalinity = 80 Cyanuric Acid = 150 Total Dissolved Solids = 700 Copper = 0 Iron = 0 Phosphates = 0 Still green! Leslies recommended using Super Floc and try to vacuum algae from pool to waste after it all has settled. This did nothing except stir up the algae again. As you can see I have put a lot of time, money, and effort into trying to get this resolved. I have had zero success. Could this be mustard algae and not green algae? Please Help!!