Just an update n quick question!! Things looking better! His pale black, grey face has started regrowing scales! I thought he just had a black face which was dull because he was Ill. Clearly been scratching them off!! Been a week tomorrow since dosing the tank with medication and was thinking of doing a 50% water change and redose to make sure it's completely gone! Do u think this would be OK or a good idea? Instructions say if redosing after a week to just change 30% of the water then redose so should be OK! Know meds are stressful but come this far and don't wanna risk an outbreak again as he still shows signs of scratching!!