What is the powdered chlorine - dichlor? Dichlor will raise your chlorine level which is what it takes to convert. However, it takes a lot of shocking to convert and dichlor will add cya. Over the week of conversion with all that you'll have to add, you may end up with a high cya level which you don't want. Or it may by cal-hypo which will add a lot of calcium. Both products have their place in pool maintenance, but for converting I think bleach is probably the best way to go because it won't add a bunch of other stuff. Others may have done it with powdered chlorine, but if it were my pool, I'd use bleach instead.
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