You should call the store location you plan on going to to ask that question.
They test water. It's free, just have to find a staff person that's able to do it. Might be strips or chemicals from a testing kit. Don't remember. Should consider investing in a test kit for home though. Better for your fish in the long run, can do it whenever you want (not just when the store's open), and you don't have to drive there
Yes they can do that. Go to the aquatics department
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