White stuff on my goldfish but not ick!

[Ashy]

I have a 55 g tank n three small goldfish. I did a gravel cleaning last week and nextday my white and orange fancy fish got white stuff visible spots on its tail. It didnt seem like ick because its been 6 days now and other 2 are not infected. I used Tetra Fungus guard on tuesday but its been two days theres no change. Now its on its head too but doesnt look like ick bcoz if it was ick he would not swim and be restless. He swims, is not gasping for air nor is it rubbing on anything. Shall i do a 40% water change and use salt treatment? I dont want to do malachite green with formalin now after one chemical treatment. Please advice.

 

[mazie51109]

It will be much easier for others to diagnose the problem if you post pictures of your fish.