Wow, this thread has turned into a lot of talk about freshwater...
I posted in the saltwater sections, so yes, I was talking about saltwater. Another questions is regards to the tests expiring...we have the Saltwater Master Liquid Test Kit which has a stamp on the bottle that when I looked more closely started thinking it might be either when it was manufactured or when it expires. Does anyone know? Its the kind in the white bottle. Our old one that I'm almost certain is too old has some random letters and numbers and then 0805 (Aug '05?) But when we went to the LFS the stamps ended with what I'm guessing is 2007 and one early 2008. I didn't trust to ask the people there since they probably wouldn't want to admit they were selling expired tests so I'm asking you guys :) | 
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