john1 Posted August 24, 2002 Report Share Posted August 24, 2002 Hi Derek Thanks. I think I'll leave my calculator in my draw. There are too many factors influencing straight calculations. I just purchased a SERA Dauertest. It is much smaller than the DUPLA. About 1" square. And from a distance I can see the CO2 content. That gives me more time to watch my babies. Thanks again John Quote Link to comment Share on other sites More sharing options...
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