Thanks for such a thorough reply, Richard. Due to imminent storm, and I need to leave town again in a couple of days, I went ahead and started the "treatment"....I'm finding that even though I've used a lot of chlorine (Cal Hypo) for shock, I am not getting a reading above just 2-3 PPM (normally, the amount of Cal Hypo I put in would give me 15 PPM)! I even threw in some Lithium Hypo! I did raise the PH first to 8.0 before adding the Yellow Out and the water is indeed a bit cloudy (from the Soda Ash). Would the Yellow Out (or the higher PH) cause a Taylor chlorine titration test to give false readings? (I would think not). I need to wait now til the storm is over (Hanna passing through later today), and see what the readings are tomorrow (e.g., FC and CC) to see what I minimally need to do before I leave on Monday (I *know* I need to vacuum and backwash before I leave). Do you suggest using acid to bring PH back down quickly from 8.0 or just let it drift...the groundwater Ph is 7.6, so I would expect the pool to get there without too much time (especially if I get a lot of rain today...they don't call it acid rain for nothin'!).

Thanks again!
-Marty