Nefretrameses & kalemvor,

Thanks for your input. I really appreciate it.

Nefre...Yes, In my frustration, I zoned out and read the instructions on the CYA jug and the 1st 2# went into the skimmer. Then I remembered using a filter bag and hanging it in front of the eyeball like you mentioned.

So far the CYA is zero after 4# of it. I added another 1.5# tonight (all that's left. The stores are out too) I've been in the pool a couple of times in the last 2 weeks trying to vac it up that way. Having the polycarb safety dome on it means I can't walk around the perimeter to vac normally. I tried putting straight CL on a white washcloth to see if it would remove the black staining but nothing. Perhaps they'll fade with time and sun next season.

I've not had so much trouble getting the pool balanced as I am this time. I get one set of #s in line and another one goes out. Today the pH is 7.2 so I must find some 20 Mule team tomorrow.

I wasn't aware that shocking overrides the poly. Thanks for that tip.