i belive it is totally down to personal preferance , as long as the feeders are healthy and kept in good conditions prior to being fed , which reading through the responces iam sure is the case here .
i really only have a problem with feeders when low quality desiesed fish are used ect , neervana breeds her own i gather so elimanates this. the other problem i have with feeders and snakeheads is when fed to fish such as gachua who in the wild only eat a very low amount of fish and instead eat crustations ect . there is not this problem with micros as 95%+ of there diet is fish, and when people feed feeders that are far too big for the fish to eat (this can and does often cause choking to death in channa)
i never use them , as i allways use frozen for ease and cost , plus i am just not a fan of useing feeders ,however i respect the choice of anyone who wishes to use them and dont see a problem if there healthy and have been fed a good diet. i can totally understand to arguments both for and against.
its quite important when useing feeders to gut load them with quality food / pellets , to give them extra nutriants as a compleate diet for micros would also include whole mamals and birds with the odd crustation thrown in ( you certainly do not want to be feeding mammals and birds in an aquarium )