Hello, my husband and I just bought a house that has an beautiful in ground pool. The pool is about 20 yrs old, has a new vinyl liner, and a new pool pump. It is currently a chlorine pool with a sand filter (may not be saying this correctly). Anyway, we were only left is a pool net and a bucket of chlorine tablets, and I think shock treatment. We want to change it to a salt water system and need someway to check chemicals and we need a pool robot… totally overwhelmed with everything out there. Not sure what is good and what is not.