I found tiny white spots on my 3" Crenicichla sp. "Xingu I" when I came back from school today. 
I haven't had an ich problem for years! The very strange thing is, no other fish in the same tank has the spots (although the Carpinte are scratching). I just checked the water parameters, and everything's fine. The pike's still eating voraciously, and so is every one of its tankmates. I did a 60% water change this afternoon. I also discovered something else: Last week, when my 4.5" datnoid was still in the tank, it was constantly scratching. I've since moved it to another tank and the scratching has stopped. ALSO, a pair of Herichthys carpinte (male and female 2.5" long) I just moved into the very same tank have begun scratching too (however, they do NOT show any white spots on their bodies). They never scratched in their original tank. Something is obviously very wrong with the water in the pike tank, eh?
I haven't had an ich problem for years! The very strange thing is, no other fish in the same tank has the spots (although the Carpinte are scratching). I just checked the water parameters, and everything's fine. The pike's still eating voraciously, and so is every one of its tankmates. I did a 60% water change this afternoon. I also discovered something else: Last week, when my 4.5" datnoid was still in the tank, it was constantly scratching. I've since moved it to another tank and the scratching has stopped. ALSO, a pair of Herichthys carpinte (male and female 2.5" long) I just moved into the very same tank have begun scratching too (however, they do NOT show any white spots on their bodies). They never scratched in their original tank. Something is obviously very wrong with the water in the pike tank, eh?
. Its the best way to keep the ich away. Bump the temp up a little, but don't go above 86. Then just add the salt. Should work itself out in a day or three. Be sure to increase the circulation of the tank with a powerhead if you can, as the dissolved oxygen in the tank will be lower cuz of the raised temp! Hope that helps! Let us know if it doesn't! 
