I checked your prior posting via your profile, and if I had looked at that post (I do not remember), my reasons for not responding would have been:
1) no tank parameter info other than size were given, not other inhabitants or lack thereof, nothing factual on the water.
2) flashing can be from many causes, not just parasites. Water conditons are equally common sources/causes IME. Water conditions are not stated.
3) whether to subject fish to a treatment process without detectable signs of illness or parasite is a purely personal and philosophic question, so the choice is your own. That is a matter of opinion, not of fact, so there is little to contribute that has not been said hundreds of times.
Whether or not posts get responses from me will depend entirely on the information provided in the post. If insufficient info is there, there is no point in my making wild guesses - it would not help you or the fish and could do harm.