First I bought 6. One came missing a gill plate. Said deformed fish, along with 2 others, are still around. Still in the Sickly Bin. (With the Oto.) Interestingly... they have no signs of white patches anymore.
The only Neon I ever had on me wedged itself behind the filter and got stuck. The other 2 were too ill to swim right or eat anymore at which point I euthanized, but survived for a very very long time.
Then I bought a group of 3 (quarantined 6 weeks) and a group of 4 (quarantined 4 weeks.) All of the 7 are now together, and about 2 of them have small signs of having those pesky white patches the first batch had months ago. (!!!) But otherwise, appear in good condition.
My experience? They are sickly fish, but I've seen amazing abilities to cling to life. (Or recover.)
I love them and hate them. :/