scaleless/sensitive fish with ick

I have read sup many opinions online and feel more confused than when I started. Last week I moved my fish from a90 gallon tank to a 100 gallon tank. My jack dempsey who I have had for almost 2 years and is about 5-6 inches just popped up with a white dots. Looks like I sifted some flour over...

So I went away with my fiance for a few days left someone in charge of our fish (never ever want to do that again) and we return home to find ICK on our fish grrrrr they are scaless fish and can not use salt or copper based meds can someone please tell me what to buy and use I have never ever...