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#1
05-27-2003, 01:53 AM
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My Hagen test kit has also proved to be as accurate as the Salifert kit-as with Sam, I have also used both.
Like Jonathan mentioned-400 ppm is not too high, it's in pretty good range, maybe a little low but not that bad at all. Calcium is a chemical that is hard to get a precise measurement with regular test kits-thus that's why we have to add so many drops before a chemical reaction takes place, just the same with alkalinity. cheers, Rich 
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cheers, Rich all that we do is touched with ocean, yet we remain on the shore of what we know http://www.advancedaquarist.com/2005/5/aquarium 
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