Chemical Auxiliary Agent Classification and 2893-78-9 CAS No. swimming pool chlorine tablets

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Good Morning
I am Ruth Delgadillo From Santiago de Chile (South America), I tell you that I am entering the pool cleaning market, this will be my first big purchase, so I would like to know several things for example :
1.- The chlorine tablets of 200 grams, can come packed in white pots of 5 pills, it would have additional cost.
2.- I also need granulated chlorine, raise ph, low ph, these products come in 25 kilo bags ?, what would be the cost of each product
3.- Regarding the shipment, because means of transport send and what is the shipping cost?
Excuse me so many questions, but it will be my first purchase
Thank you