Thanks for the response.
The yellow tang looks about the same with the fin damage. I am doing everything to lower the nitrate level in the DT. It is still at 20. I just bought more live rock and mangrove plants. The yellow tang is acting active and normal and will not be easy to catch for treatment.
How would you recommend continuing treatment for the Foxface with BiFuran+? Is it OK to use it for much longer than 7 days? Or should I space it out into groups of 7 days with so many days apart? What is the rational for the continued treatment? Isn't all the bacteria gone after 7 days? For humans, it is bad to take antibiotics for longer than the set course. Not sure if that applies to fish.
I only have a 10 gal
QT. Would you recommend replacing it with a 20 gal
or make do with it?