Hi guys I'm doing freshwater baths on my Yellow Longnosed Butterflyfish and I was wondering if I can throw a few copper pennies in the bath, if that will do any good to help distroy ich, I was also wondering why my Butterflyfish still has ich or those white spots on him, while my yellow tank and regal Tang are all healed up from the ich out break, I was also wondering if maybe those are just wounds that take time to heal up.