I am on my fourth day of treating my Betta with malachite green for Velvet. What should I do if after four days it still hasn't gone away. The back of the bottle says treatment should usually last 3 to 4 days and I'm worried if I continue I will overmedicate him. He is still eating lots and has lots of energy but I think I still see the shimmery gold near his face and he's swimming right into his bubbler and just hanging out over it. I attached a photo of him because I'm second guessing my original diagnosis.