Welcome to the retail store. There testing is so inaccurate that your head will spin. Please be careful as the retail store will sell you items you do not need. Phosphates, a complete myth. I had an algae problem this past summer and I purchased over $400 worth of chemicals based on their recommendations and went nowhere. Over 10 separate trips. After careful research, I joined a pool forum and within two weeks my pool went from green to clear. It only cost me $3 a bottle for 8.25% bleach. Total cost was around $100 at the most. Recommend to everyone to join a forum so you can learn how to really take care of a pool. Use Google as your friend for a search engine. I do not want anything thinking that I am part of any particular forum, so please determine which group is best for you.
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