My Betta has that brown or "rusty" like color to him with large gold spots on his fins and has for awhile. I didn't start treating him for velvet until he started flashing against tank ornaments, twitching, and having lethargic moments. This is why I'm not sure when to stop treating him.. He's been that color for a long time with no other behavioral symptoms.
Sorry to thread jack but does anyone understand the directions for quick cure? It says one drop per gallon and three daily treatments before changing the water or something? Did you build up to 3 drops then do a 100% change or did you just do one drop per gallon consistently with 100% daily water changes?