First Post... Been lurking a while... Learning.... About a month ago we started chasing chlorine in our 11000 Ga fiberglass pool. We were using a test kit my wife bought 2 years ago at Leslies. We have an automatic chlorine "puck" feeder that we were using and keeping filled. Since we constantly had no chlorine in the pool... we were throwing pucks at the pool like crazy.. we kept the feeder full... added some to skimmer basket... added some to our floater... etc. Finally we brought a sample to The Great Escape and was told that our CYA was 155. They recommended either a water swap or a "new" chemical treatment that would cost a couple hundred dollars. I did some research on the chemical treatment and found that it is not very effective so I opted for the water swap. Did 3 separate 18" or so water swaps. Brought the water back to The Great Escape and was told our CYA was 5. Added a couple pounds of CYA in the sock method and went up to 30 under my test. At this time... Leslies tested and told me it was at 50. I was still chasing chlorine.. basically the test kit showed chlorine of 0. I was afraid of throwing more pucks at the pool and found this site. Thinking that my test kit was bad (old) and needing a FAS-DPD test anyway... I ordered the TF-100 kit as recommended for the SLAM. I forgot to mention... that my water is and was always crystal clear this entire time. so clear... I can tell heads or tails on a quarter in the deep end. I am in day 4 of the SLAM and don't feel like I am making any progress. I have searched everywhere for algae. No removable steps... (molded steps). No organic material in pool whatsoever. Doing the test gives varying results. My CC seems to fluctuate between 1.0 and 0. I have switched to liquid chlorine 12.5% from Menards (20gal) in so far...just finished my last gallon of 12.5% and now I have 20 gallons of 10% from Rural King in the garage. Since starting the SLAM... I have kept the safety cover off the pool. I have 1 light (pentair globrite) that I don't see any growth when looking at it. I don't have the tool to remove the light itself so can't check behind. Any ideas?? The wife (very impatient jersey girl) is killing me. I have tested the water so much that I am about to run out of powder and 0871 drops and my refill from TFKits will be here on Saturday. HELP..