The Planted Tank Forum - View Single Post - 5 dead cardinals the morning after purchase
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Old 10-08-2012, 02:28 AM   #17
dmagerl
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Are you running CO2? I had horrible cardinal loses with CO2. I learned that I had to turn off the CO2 the day before introducing cardinals to let the tank outgas, then turn it back on a day later after adding the cardinals.

No losses after doing that.
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