I have bought 7 from Petco. Two were tiny baby fry that both died. They are too fragile for me to care for properly, so it was my fault they died. Two females died, again my fault for not QTing their neon tank mates. The rest are doing fine, have had my oldest since January.
I bought one from a LFS and he is currently sick but recovering from fin melt. I think I did not do enough water changes, my bad!
I got 6 females from a breeder here on the forum and they are gorgeous and healthy also. But 3 died, again from my negligence in not QTing their neon tank mates. I was really upset about that because they were so gorgeous
I bought one female from another breeder on this board and she's doing great.
Just got 3 yesterday from a third breeder on this board. The 2 females are doing great and the male needs a lot of work to get his fins back in form after unsuccessful breeding attempts and tail biting.
I think it matters not where you get them but the care you give them when you get home that counts.