The easy, affordable and professional way to chlorinate your pool or spa. Our automatic pool chlorinators are efficient, corrosion-proof feeders designed for easy installation on new or existing pools or spas ranging up to a 9 lb. Capacity. The automatic chlorinators use large or small Tri-Chlor slow dissolving tablets or sticks - enough to supply three weeks of chlorine sanitation for a large pools and longer for smaller pools. The easy to use integral dial control valve lets you accurately adjust the rate of chlorinating needed to keep your pool sparkling clean.