Would you be able to post a clear pic or two of the fish in distress using the brightest white lights you have, turning all blues down for clarity? A short video can also be helpful, posting first to YouTube, then linking back to R2R is a way to ensure that all R2R members will be able to view the video. Then, the R2R Fish Medic team can offer a diagnosis and treatment plan going forward, if warranted.
Best of luck to you and your Foxface!