Adding on.
Chemicals I have used this year:
Amazon.com : Kem-Tek 005 Pool and Spa All-in-One Concentrated Chlorinating Granules, 5-Pound : Swimming Pool Chlorine : Patio, Lawn Garden
Amazon.com : Kem-Tek KTK-50-0010 pH Minus Pool and Spa Chemicals, 7 Pounds : Swimming Pool Ph Balancers ...