Do you have one of the test kits we endorse- either the TF-100 or the Taylor K-2006C. Both use the same reagent brand (Taylor) but the TF-100 is less costly and a better buy. www.tftestkits.net is where you get the TF-100 and the salt test. For the other kit you can try Amazon, but make sure its reagents are fresh. Neither are available at most pool stores. The K-2005 is *not* the same and is missing an important element.
Run a full panel of tests, and tell us the results:
Hows the water look?
Is it well or city water?
What have you added to the pool lately?