OK, Here's the deal.. pool has been great all summer, no major adjustment accept for one ph up ( was low after heavy rain)and one bag of salt. TC has been good holding 3.5-4.5 ppm with swg at 50%, filter running from 9-6 and the 2-330(am) every day. The last two weeks I had to bump up the swg..we seeemed to be using a lot more cl. I chalked it up to the extra heat and pool water being ~88deg or better daily. Also if I'm not in the pool the solar cover is on....always. Long story short we've had a very humid and rainy week. Today I rolled up the cover and about died! WhEW!!!! Pool stunk like dead fish and was a little cloudy with a very slight green tint...AHHHHHH . CL was at 0, ph 7.2 ak 120, salt 2850 and here's the kicker..my cya was 0. I'm new to IG with the swg, am I supposed to be checking/adding cya on a regular basis. It never dissapered like that in my old AG and I used to use unstablized tri-chlor pucks. Either way I've been at it all day, added 4.5 gal of 6% to get back on the chart, then added two bags of sodium shock ( using up left over stock from ag ), srubbed the walls, let it set for a bit then vacumed, then threw in my extra ctg while I cleaned the other one...and amidst all this using the stocking method to add cya. It allready looks and smells much better! So where did my cya go! I have read about it being gone over winter closing but to just dissaper in the middle of the season is wierd. I haven't added a whole lot of water either....twice I was about 1" lower than norm and threw in the hose, mother nature has done the rest for me this year. If I had to guess I would say we've used maybe a foot of water this year...out of almost 21k I really don't think that's alot...maybe I wrong. Anyway I'm getting back to normal and I'll post numbers tomorrow....in the meanwhile all comments welcome and thanks in advace for any adivce.
PS ....Yep..I inspected the cell and it looked good..pool is new this year...and YES I LOVE IT!!!!!!!