White spots on Gold fish!?

Oh my goodness... you have to dissolve the salt before putting it in the tank. Take out a few cups of tank water and dissolve the salt. You have angelfish with goldfish? If so take the angel fish back. They are tropical and the others are not. You should also get rid of the two carps. They're overstocking you. The 6 fantails alone stock you. On the bottle of medicine it should say how much to add. Most of the time its a drop a gallon. So for 80 gallons you do 80 drops.... The salt should help a little but not as much as keeping the water clean and quarantining new fish will.