hey newkidonthetank yes it is only dye, however the process they went through to become dyed is not something that a good fish keeper would want.
I disagree with "give them a good home and take care of them" if you dont buy them then they wont be produced, its unfortunate that you. However luckly you know about them now. Ild get rid of the incandescant lighting seening you have the others.
Also the neon would probally do better with some pals.
And just watch the melon sword, might out grow the tank