I got 2 goldfish and 1 blackmoor for my birthday on thursday. Two days later I saw my platys with something that seemed like tiny bits of salt in their skin. Today I did a 25% water change and the female look better than the male platys but I also noticed that the black moor has some white spots of a different kind it seems as if he got bitten. My corys and plecos look fine. Whats happening? Pls advice.