hi everyone, I currently have 2 firefish in a 13g qt, i started them w a 5m fresh water dip them on praxipro for 5 days, cleaned and redosed tank after 5 days more w praxipro. After day 10, i started using cupramine increasing lvls over a 2day period to match the 0.5 copper lvl needed. I would then clean the tank every 6days as there was no carbon or other media to leach out the cupramine. I would also add additional cupramine to maintain the 0.5 cupramine lvl after each cleaning- this has worked for me every time until... After 13days of cupramine, i noticed that both firefish started to flash a couple times on the pvc pipes indicating possible ich of which i did not see any spots on fins or tail. I did notice both had a loose scale so maybe they were trying to dislodge them. Both do not show signs of hard breathing and have very healty appetites (ammonia, nitite, and nitrate lvls are 0). Suggestions would be greatly appreciated. I figured to be safe, qt them w cupramine for additional 2 more weeks (total of 27 days of curpamine possibly to long?) to be on the safe side.