Agree with the advice given. Your tiger dollars (Metynnis fasciatus) should recover with excellent water quality, an eye on preventing secondary infection, and providing a habitat that is not prone to sudden noises, vibrations or lights. That would do wonders to heal and calm them. Over a few weeks the white lips can disappear and the fish may show they real behaviors. Good luck!
You say the other dollars you purchased were 'red hooks'. Current lingo in too many pet stores is to call so several species Metynnis (quite often not including the real red hooks of the genus Myloplus). They do that simply because they have a very noticeable red anal fin, specially the females. Post pictures here to see what kind of dollars you have, and if possible post pictures of the fish as they settle down and recover from the minor damage they incurred.
You say the other dollars you purchased were 'red hooks'. Current lingo in too many pet stores is to call so several species Metynnis (quite often not including the real red hooks of the genus Myloplus). They do that simply because they have a very noticeable red anal fin, specially the females. Post pictures here to see what kind of dollars you have, and if possible post pictures of the fish as they settle down and recover from the minor damage they incurred.
