There are others here who could tell you exactly what and why to dose the pool - I'm not one of them However, if you'd kindly give us a full set of test results, even I can tell you where to get the levels before you cover the pool for 6 weeks. Basically, you're 'winterizing' the pool for 6 weeks in the summer, you need to have adequate chlorine and be sure that your other levels are good for that time period.