Hello, I'm a retired 64 year old living on beautiful Lake Martin in Dadeville, Alabama. We had vinyl liner pools at our two previous homes in Montgomery, AL and had a gunnite(?) pool installed at the lake in Spring 2019. So I have probably 25 years or so of experience dealing with pool issues. While I was finishing college I worked for about 5 years as a technician servicing copiers and other office equipment. After that I worked for about 30 years in the IT field, starting as a COBOL programmer in 1986 and ending up working with DB2 and SQL Server databases.