The Jack’s Magic Jack Pacs Treatment #1 Pack is a strategically assembled kit that contains all of the necessary chemicals needed to treat and maintain a 10,000 gallon pool. This kit is part of Step 2 of the Jack’s Magic Stain Program to help maintain a clear pool once a stain initially treated. There is no need for guessing what products you will need when using this treatment pack, which will help make maintaining your pool stress free.