Hello there. I am Rene' (rymes with today) I live in Texas and have a 15,000 gallon, in ground, salt water pool. My builder built a great pool and hot tub but I can't get him back to teach me how to maintain it. It has a D.E. filter as well. My test kit is missing the handbook too. So guys, I need to learn when and how to test and treat my pool. I have owned a fresh water pool before and did well with it. I do not wish to keep running back to the pool store to have them test for me. They always add extra "things" I need.