i have tested clacium of my tank with two differetn test kits and both give the same results. As for the water, it was freshly made so i will wait a day or two and test again. The water changes i have doen latley have been with freshly made salt water also.... coul that be a problem? Or does the test kit just show inaccurate results when it is fresh? I just bought a phosphate test kit and they are at 0....this just keeps getting more complicated. My sister is going to wichita this weekend to take a test and she will pick me up an alk test there so i will be able to test that soon. I had my tank lights on for 3 hours today and hair algae is also now starting to grow, so i turned the lights off