What are you using to test the water with? Sometime the plastic types aren't very reliable. If it is the plastic type, test it with ro water, it should read 1.0. If not give it a good cleaning and test it again. I use vinager and hot water to clean mine. just give it a good rinse before using it again.
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Marty
50g reef, bubble king skimmer,20g sump,zeovit system, PM cal reactor
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