Hello I have a 10 gal aquarium with 4 gold fish in it,(they will be moved to a pond my parents are letting me build) But for now they are in the 10 gal. well recently they have been like repededly opening their mouths and closing them. I have been feeding them well and I didn't know what might be wrong can you give me any help. Thanks for your time.
Minktrapper24
Minktrapper24