I thought the salt essentially stays in the pool, broken down to chlorine and sodium that recombines to sodium chloride. Why do you need to add that much salt every year?I have had pools with a Salt Water Chlorine Generator for 30 years in NJ. Only downside is getting about 12 40lbs bags of pool salt every year from Walmart for my pool opening. Once the salt is in the pool and the SWCG is generating chlorine there is little to do other then check the water chemistry weekly, confirm the cell is still generating, and tweak the % generation as the season changes.
You will find a good comparison of SWCG products at...
Compare and Review Saltwater Chlorine Generator Prices and Features | DSP
www.discountsaltpool.com
Lots of folks here like the Circupool products.
Circupool SWG - Further Reading
www.troublefreepool.com