I recently purchased a home with a pool without knowing anything about pools or taking care of them, reasoning I could learn from resources like TFP. I also purchased a book on Amazon called Pool Maintenance Made Easy by John Brace. In the book (it doesn't have page numbers!) it says "You should not use tablet or liquid chlorine with a vinyl pool. Instead use granular chlorine only." This was alarming because my setup has a chlorine feeder with tablets inside. Should I be worried?