Quote Originally Posted by kelemvor View Post
Memory's a little fuzzy since it was last fall, but I think it was about 2 lbs (1/2 of one of the "large" boxes of arm and hammer). Since I had that acid spill I keep several boxes on hand at home "just in case".
Thanks. I might give that a try the first time and see how it goes.

Like you, I don't want to put the calcium back into the pool, but like was mentioned, it's probably an very insignificant amount. At least I know my options now.