Hi, Dana,
Watermom's got you on the right track....get tested right away. If you can't find the test kit you need, go to a pool store that will test for you. Ben's kit is the best and everyone here is familiar with it....I'd get it on order. Post your numbers for those things you listed and you'll be off and running.
Aside from bleach, I would not plan on storing much of anything else. Additionally, I personally don't store more than two weeks bleach because it does lose it's strength....particularly in sunlight. Most of the other items will be "one time" additives and you can pick them up as needed at the grocery store.
I think I reccomended this site to you before the crash but will do so again in case my memory has failed me.![]()
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http://www.deh.enr.state.nc.us/ehs/chem.htm#ta
The size (gallons) of your pool is important to calculate chemical quantities.
I, too, think the baking soda will be fine
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