CYA is the ONLY test that I also get done at the local pool store to double check with my results from my Taylor kit. This is because I personally find that determining when the dot really "disappears" is kind of iffy to me/my eyes. So I double check that one at the pool store. But like the others mentioned, if it's consuming that much chlorine only in the daylight hours when the sun is present and very minimal at night, then that leads us to believe that CYA is the culprit. I must admit, you've gone through a ton of bleach...more so than most do, but once it's clear and no algae is present and your CC is 0...it'll all be worth it (final determination to stop SLAM is when it passes OCLT)! You are SO close and almost have "won the war" so to speak. Keep it up buddy...that 3rd step is almost visible and then soon the bottom will be. My main piece of advice is afterwards, be diligent on testing and keeping it clean. It is MUCH easier imo to do a little each week, than to become relaxed and have it revert back to an algae outbreak and having to SLAM all over again. You got this man!
