There is disclosed an automatic chemical feed system for retro-fitting to
any existing fluid circulating system of the type having an inlet pipe
which feeds water to a fluid reservoir and an outlet pipe for feeding
fluid to the circulating system, the present system including an inlet
pipe adapter for inner connection with the inlet pipe, a fluid diverter
connected to the adapter for diverting a portion of the flow, a chemical
chamber containing a supply of fluid purification chemicals in solid
particulate format, the chamber being in fluid communication with the
diverter, and the chamber having an inlet opening for allowing fluid to
enter the chamber, and an outlet opening for passing treated fluid out of
the chamber back to the fluid reservoir for circulation in the circulating
system.