What chemicals do you have to purchase for a new 33x53 above ground swimming pool?

Chlorine: either in the form of tablets(99%) or liquid (12.5%). OR Bromine but you still should use some liquid chlorine even with this. Muriatic Acid, CYA = cyanuric acid/conditioner Other items you may need or have to use depending upon how you maintain your pool: Soda ash, algaecide, tile cleaning soap, water clearifier. etc., etc.