Hello, I am new,so sorry if my question has been 'done' before! We opened our 16x32 (Aprox 15,000 gal)inground pool couple weeks ago, Noticed some algae, but nothing unusual, water clear. Next morning pool looked like giant alka sletzer was dissolved in it--couldn't even see bottem. PH was slightly low, lowest acid level. Pool store had me raise PH, add Alk+, green algaecide, shock, backwash. Following week noticed slimy sides, still no chlorine. They had me pink algaecide treat,, shock, backwash. Still no chlorine level. They had me add 4 lbs stabilizer. Next week noticed yellow 'paint brush' like streaks all around water line and cloudy looking stuff laying in the liner seams. Called store owner, she said sounds like mustard algae and the stuff in seams is dead algae (looked like dissolving toilet paper when brushed). She had me shock 4 nights in a row, 32, oz, then 20 following nights. I got chlorine reading the first day, and then nothing since. Yesterday, I noticed some yellow algae AGAIN. I cleaned and shocked last night. Still no chlorine reading. My ph is 7.2, acid level is lowest color on strip. The pool water is always clear. I use granulated chlorine (Zappit 73) Sorry to be so chatty, but I wanted you to know how much I've done. PLEASE HELP! Thanks, Debbie