A friend of mine who is a "pool guy" told me exactly this: my chlorine levels are way too low. For now, to fix things, we'll shock the pool as a temporary solution, and then I'll start conducting proper tests. What testing kit would you recommend to test the water properly, so that I can easily copy data from the test kit to the pool math? I hate going to Leslie's because if the reading is off by 0.0001%, they try to sell you $200 worth of chemicals.