This year is like the health issue year in my tank... anyways, the longear is now swimming with its head looking down like if it was looking for something on the substrate, but it does this 95% of the time. It rarely swims normal and when it does, it is for about 5 seconds. I noticed it has this white- clear flap in its gills. I just did a 45% water change and dosed prazi pro. Anything I can do to save its life?