Hello from Richmond, Texas - we have an in-ground, plaster pool approximately 15,000 gallons - pool was built in 2000 - kids have all grown and are living elsewhere so I am trying to learn to care for the pool myself - I own a Dolphin Pool Cleaner and have been using the Clorox Pool and Spa app to test the water and get the chemistry correct - so it's just my wife and I and we would like to create a pool with water that is sparkling, clear and easy on the skin - I am 72 she is 64 -