Pool Mate Calcium Increaser for Swimming Pools

dissolves quickly; raised hardness as expected; cost less than most other hardners

I have ordered some pool products from Amazon and was very disappointed with what I actually got figured I'd try Wal-Mart incase I had to take it back.Product arrived 2 days early was exactly as advertised added to pool as directed took a sample to pool store and ppm was at levels expected.It arrived in 3 days and was 40% cheaper than buying at a pool or home improvement store.Will definitely be reordering more for spring.