First betta: Was the salt dissolved before adding?
Did you do a water change EVERY day?
Did you replace the salt that was taken out during water changes?
How much EPSOM salt did you use per gallon?
Second betta:
The water changes are sufficient for the size of tank... If you can, cehck with how many cups of water can fit in your tank. That gives you a rough standing (16 cups per gallon).
Can you get a picture up of both bettas? That would help a great deal!!
Did you do a water change EVERY day?
Did you replace the salt that was taken out during water changes?
How much EPSOM salt did you use per gallon?
Second betta:
The water changes are sufficient for the size of tank... If you can, cehck with how many cups of water can fit in your tank. That gives you a rough standing (16 cups per gallon).
Can you get a picture up of both bettas? That would help a great deal!!