No image shown. Little white specks that may come and go are probably Ich but without a good photo it's impossible to say for sure. I'm guessing you didn't quarantine them prior to adding them to your tank?
The only truly reliable way to get rid of Ich (assuming that's what it is) is tto remove the fish to a QT tank, treat them there, and keep your display tank fallow (100% fishless) for a minimum of 72 days.
There is a great sticky about treating infected fish. My preference is for the Tank Transfer Method (TTM). It requires no medications - just several containers (5g buckets work well) with heaters and powerheads that can be sterilized between uses.