Start-up with chorine after 2yrs of Baqua-yuck

[csupp]

Here are test numbers from this morning (Thursday):

FC - 6.5
CC - .5
pH - 7.6
TA - 130
CYA - 0

After a week I still don't have stabilizer registering. I finally had to do a backwash last night, because circulation had slowed down. Heavy load of swimmers and sun over the holiday weekend. To the point where I couldn't get the FC to register on Tuesday evening. Shocked with 5lbs of cal hypo (49%) Tuesday evening. Another heavy load of swimmers Wednesday (kids are out of school), so I shocked again Wednesday night, this time with six 3/4 gallon jugs of 6% (s'what the wife brought home from Target). I'm guessing I need to pick up another bottle of stabilizer and see if I can get it dialed in. Today is cloudy, so I may have a day without swimmers, to get the chemistry right.

[Watermom]

Your stabilizer would be dissolved by now. In a pool this size, 4lbs. of stabilizer should have added about 20ppm of CYA which can't easily be read with the tester. Go ahead and add another 4 lbs. and give it a week to dissolve. That should take you up to about 40ppm or so which would be a good level.