After a lot of reading on this site, I've proclaimed that after having this pool for almost 9 years I am tired of being hosed by the pool stores and ready to handle ALL the testing and maintenance. From what I've read, there are many knowledgeable people on this forum with a lot of patience. I've always done the light work and never had a pool maintenance co. so I'm pretty comfortable with the work. I am anxiously awaiting my TS 100 kit today and ready to get with it. Hopefully I've got my signature in order and it comes across legible.