Whether to prophylactically treat or passively observe in QT has more to do with
you than the fish.
People who should always prophylactically treat for ich & flukes are:
- Not the overly observant types.
- Don't have 10-15 minutes every day to sit in front of the QT to observe for symptoms.
Folks who can get by with just passive observation in QT include:
- Attention to detail types, who will notice not just obvious physical symptoms of disease but behavioral ones such as scratching/rubbing, flashing, head twitching, heavy breathing, swimming into the flow of a powerhead, purposely staying out of the light, etc.
- Have the time & patience to sit in front of the QT every single day to observe for the above.