Welcome Brock,
Right now your pH of 7.5 (if correct) is fine. Your TA will likely contribute to pH rise, but it's best to focus on pH first.
Do you plan on taking care of this pool on your own? If you do, it will be the best thing you can do for it, but it will require some effort on your part to learn.
Start with the very basics in Pool School. Click the links in my signature and they will take you there. Start with the ABC's and work your way through. We don't rely on Pool Store testing as it is often not accurate and they are only motivated to sell you SOMETHING each time you are in. As in your case, you really don't need the dry acid (which we don't usually recommend) when your pH is really OK. But, their paper said to add it anyway.
If you decide to do this, you will need a proper test kit. I only suggest the TF 100 because you can't beat the value of this kit. Once you get into it, we are always here to help and answer questions if you want to learn how to do this. Let us know, and enjoy the forums.