When I set up my first tank I used four neons to cycle (NEWB!), and three tanks transfers later they are still alive. I've lost 3 Cardinals out of around 20 and they were from an LFS that is notorious for having bad stock. They were the only ones that had them in stock at the time so I took a gamble and lost.
I have five schools of Tetra(neon, cardinal, phatom, serpae, and black neon) and so far I've only lost the 3Cardinals, 1 Phantom, and one black after several months. My water is about as hard as it gets but I buy locally so I assume the LFS has the same hardness as me since most of them do not use RO water.
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~Chris~
55g planted; 30g planted; 5g planted
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