I just noticed today that my Royal Gramma has a small white spot on the pectoral fin. It has a good appetite and is very active. No visible signs of sickness. I started dosing Copper Power on 7/30, and the current copper level after a 10% water change is around 1.0 ppm. Should I increase the dosage? I'm also quarantining 3 Talbot's damselfish with it and none of them have any spots.