The Planted Tank Forum - View Single Post - First day of CO2 and 5 tetras died :(
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post #7 of (permalink) Old 02-12-2013, 04:48 AM
Planted Tank Obsessed
Join Date: Sep 2012
Location: TX
Posts: 474
My assumption would be that with a 3 week old tank (and no reference to when the fish were added) that the fish were having issues before you added the CO2.
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