With two months of 20G refills.

Everything you'll need to start enjoying your pool using less chemicals. For above ground and in ground pools from 20,000 gallons up to 29,999 gallons.  Kit contains dispenser, base and installation parts to adapt  your new or existing pool to the PoolNaturally system.  Includes 20 large size 20G PoolNaturally refills in one convenient kit.