OK moved over to this forum for TA help

[SoCalBoo]

Personally, I wouldn't poly until you've held a chlorine level from sundown to the next morning, and the stuff is still there. Until then, you've got something eating your chlorine. It can take days (took me 6 days with a mustard algae bloom earlier this year). Be patient. Make room in the recycling bin for bleach bottles. Brush twice a day.

Make sure you check your CYA level to make sure you are hitting it with enough chlorine.

[SoCalBoo]

Opps, see that you posted your CYA of 40 in the first post. My bad. 15ppm for shock should do it according to Ben's Best Guess Chart. Still wouldn't consider poly until you held constant chlorine level overnight.

[Madty]

SoCAl-
My chlorine has been constant for a couple of days- I even put 2 more gallons of bleach in last night. My last pool store said my CYA was 30. One said 40. Should I try to raise to help out my chlorine?
I hear that mustard alge is resistant to chlorine. I see no color top the water- just no sparkle- kinda hazy. I'm trying to keep my ph low (7.2) to help out. It just seem to be helping. I've got my son's b'day party saturday and want this to be ready. I also smell a lot of bleach- probably due to adding so much.

[SoCalBoo]

CYA level is personal preference. Can't really tell you that 30 or 40 is 'bad'. I personally shoot for about 50 in my pool, but that is what seems to work for me.

There are others who have a lot more experience in caring for pools (especially vinyl) than I do, but if you held a constant chlorine level over night, then I think you are good on the shocking, except for (maybe) the existance of whatever it is you seem on your seams. I'd keep brushing and vacuuming.

Poly is certainly an option to consider. Get the 60% stuff if you do.