1,The device is suitable for use in brackish water pools, highly corrosion-resistant materials and processes to the durability of the product.The product can be safely used in salt water with salt concentration not exceeding 5000ppm and chlorine content not higher than 4ppm.It is recommended that the product be cleaned once after each cycle Other chemical levels to check: Chlorine (if chlorine is used): 4ppm max pH: 7.0-7.8 PPM.