Your Neons will adapt once they learn the Danios are harmless.
I have ghost shrimp.
It took them two weeks to come out of hiding. I was quite concerned thinking they would spend their entire lives miserable and in hiding because they were scared to death of these missile shaped fish speeding everywhere.
Now they couldn't care less... they're out and about a lot more and will even swim right into a group of Danios to access food... especially on Saturdays when they're good and hungry (Friday is fasting day for the aquarium).
I have ghost shrimp.
It took them two weeks to come out of hiding. I was quite concerned thinking they would spend their entire lives miserable and in hiding because they were scared to death of these missile shaped fish speeding everywhere.
Now they couldn't care less... they're out and about a lot more and will even swim right into a group of Danios to access food... especially on Saturdays when they're good and hungry (Friday is fasting day for the aquarium).