The first thing you really need to do is to test your water with a drop-based kit and post your results, then it'll be easier for us to tell you what you need to do. I would keep a box of baking soda (for raising TA), a box of Borax (for raising pH), and if your CYA was low last year, a container of stabilizer to be added to raise it. However, I wouldn't add any of that stuff to the pool until you've got a good set of test numbers. People use the trichlor pucks or sticks for raising CYA, but if you already have a low pH problem, the use of these is only going to compound it, so I'd add it via CYA granules instead of through trichlor.
Janet
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