First I did do the QT for all the new fish I get and let them in for three weeks.
Is the QT I am doing ok or is there something doing wrong or need to add?
That is what I do not understand you do everything to not let it happen put still hits.
I do all 50% as WC, and the water numbers ok.

Well I have a rainbow I see with popeye.
Can I treat the fish in the tank with what?
Or as you all said catch it and put it in a QT and treat it with what?
What is there as foods and other thing for fish to stay Healthy happy fish?
I do not like to use med's also.
Is there anything esle that I need to look at that you all know that also help me?
For example, ich can be treated by raising the temperature to the low 90's for a few days.
Thank you for that BILL anything like more of that I did not see in a books?