Ich is a horrible bacterial infection that is common with Goldfish.

It makes your feel appear to have white spots all over the fish.  It will look as if somebody sprinkled salt on the fish.

From the day that your fish gets Ich, your fish has about 6 days to live unless you medicate the fish fast enough.

You can raise the temperature in your tank up to 84 degrees, which will help out a lot.

Purchase medication for your fish as soon as possible.

You can purchase freshwater salt to give your fish a salt bath.  Add the recommended dosage of salt on the box.

Turn off the light to avoid causing your fish to get stressed out.

Keep adding the recommended dosage over the next week.

If you notice that your fish also has torn fins you need to treat the fish for Fin rot as well.  This is a secondary bacterial infection.

To avoid Ich in the future:

Do water changes once every 2 weeks

Do not over feed your fish

Do not over crowd your fish

Change your filter cartridges with water changes