I am doing just that since I had to move them to a smaller bowl since they are sick I didn't want to be having to empty a 3 gallon tank twice a week.
I'm going to try the salt for 10 days and see if that helps along with the water change and stress coat. Hopefully they will get better and I can move them back to their larger tanks.
I think I'm stressed out at this point. No one seems to know why the crown tail has the red droplets of blood on his fins and the fins are stringy now... : (
I forgot to add. I've had Bettas for 14 years now and never ran across this problem.
Thanks for your help.