Depending on what the action is, it can be more detrimental than inaction when dont know what we are dealing with.
As an old timer, always had salt in most of f/w tanks, the amt depending on types of fish in the tanks.
If possible, treat in Q/T. Record the volume of water and amt of salt (concentration) and the progress. Such jouranal will definitely be an asset in fish keeping down the road.
Although cant verify for sure from the pics, but from my experiences of handlilng many many Rainbows and others, I found that fish in their ideal water condition water & and good husbandry did provided a high chance of recovery w/o meds.
Such Sores and pimples does not necessary means infection. Spooked fish do bumped into galss and/or other objects.
Like I said, hard to say what it is. If the lips, not mouth, turns pale/white, that should be treated as soon as possible.
At least your fish is eating and swimming/behaving normally, I would still just monitor the fish and water condition.
Have you added any new fish just prior to this mishap?
Upon searching internet, cound not find what the ingredients are for Interpet Internal Bacteria Remedy other than it claims to be effective againt Aero, Pseudo and Vibrio Bacteria which all belongs to ORDER Eubacteriales where most of common fish paththogenic bacteria are found.
I would personally hold off on med if your water is w/in reason and/or until more changes are noticed.
Final call is yours, my man!
Hope all goes well!
Remember to keep record of all the events, actions, progress, and results.
