Clorox Pool & Spa: 5-Lb Alkalinity Increaser $6, 5-Lb pH Down $4.80, 4-Lb pH Up $4.20

Clorox Pool & Spa: 5-Lb Alkalinity Increaser $6, 5-Lb pH Down $4.80, 4-Lb pH Up $4.20 Shipping is free with Prime or on $35+ orders. Note: Items are also available for the same price via Subscribe & Save. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.