Grace;

Before dumping anything into that pool make sure you are following the builders instructions!

If you are not the owner/builder get a print out of the start up instructions from your builder and follow them to the letter! If you don't follow your builder's directions and that plaster delaminates you could have voided your warranty!

If you are an owner/builder and you hired a pool guy for start up get his instructions for what you should do next during transition to normal chemistry levels.

Essentially if you began an acid start and you raise the pH to soon you could create problems for yourself. Don't panic 6.2 isn't a panic level I was lower than that initially. Just do not run pumps or equipment while the pH is that low just brush your plaster 2 to 3 times a day. As the plaster dust comes off the plaster within a few days your pH will rise on it's own.

Anyway here's' the best start-up instructions I could find.

http://www.npconline.net/start%20up.pdf

I've been following them and my pool is looking perfect!
hth,
Jo