Dichlor is ok to use if your CYA level isn't too high. Do you know your level? If your CYA is high, then using either plain household bleach (generic is fine) or liquid pool store chlorine are good alternatives. Also, if your calcium levels are low, cal-hypo may be a choice.
Do you have a current set of water testing results taken with a drops-based kit that you can post for someone here to look at?
Welcome to the Pool Forum!
EDIT: Looks like Janet and I were posting at the same time!
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