ok, new here, sortof...started on this awesome site last summer after purchasing 18x48 round intex pool from walmart but can't remember my old username so i just created a new one. Decided to upgrade the pool this yr and thought I'd come back here for info and advice. My salesperson insists I don't need to use liquid chlorine b/c of liner problems and with the money I've spent just wanted to make sure I'm okay going against her advice. Was gonna shock my pool using it b/c my other readings are fine, just needed to get chlorine to shock level and she insists on using the bags of shock instead.