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RichConley · 07/20/2006, 10:17 AM

Fishgrrl, the problem is, your surveys cover too much time. If there is no corelation, than someone who kept their tank for 2 years without a skimmer and then 1 year with a skimmer would be twice as likely to have GBD occur during the time without a skimmer. Thats going to seriously skew the rates.

07/20/2006, 10:17 AM	#80
RichConley Registered Member Join Date: Sep 2004 Location: Bostonian in Chicago going to DC Posts: 9,908	Fishgrrl, the problem is, your surveys cover too much time. If there is no corelation, than someone who kept their tank for 2 years without a skimmer and then 1 year with a skimmer would be twice as likely to have GBD occur during the time without a skimmer. Thats going to seriously skew the rates. __________________ NO TANKS!!!