Intex 2500 GPH Filter Pump & Krystal Clear Saltwater Pool Chlorinator w/ GFCI New GFCI outlet feature adds additional safety and security by cutting of electrical current when components are exposed to water Provides sanitized &amp; sparkling, chemical free pool water. No more red eyes or adversely affected hair, clothes &amp; pool liners. This system utilizes two functions to naturally sanitize your pool water: Produces natural chlorine from saltwater which attacks bacteria. Copper ionization feature releases highly active disinfectant ions which creates a potent biocide and attack algae more aggressively than chlorine alone or other packaged pool chemicals.