My niece's tank has ick...

[fishmommie]

If they have been infected for a while, the spots are not going to go away easy or fast. If the spots look like salt, it's ich. Just tell her to keep the heat at 86 and be patient. KEEP THE HEAT at 86 for another 5 - 7 days after she sees the last spot or she'll be treating again...
It's not an easy fix but it does work if you stay the course.

[Countrylovin4evr]

right. I know most fail because they think its gone before it really is. Must be a stubburn strain. My guess is that they MUST have been sick awhile because the two died yesterday before the tank got up to 86. She's been slowly raising it and had it at 84 over night then uped it a bit more to about 86 after taking the dead ones out. She said 2 of the 3 she bough had signs of ick, but one of the ones that died is the one that DID NOT have the spots at the time. Again, must have been pretty sick for awhile. The smallest is surviving though I understand and all other fish doing well. Maybe she'll get lucky and only that one fish will get it because of temps and other fish being healthy to start with. Keeping fingers crossed for her.
On a side note, the store told her she could bring back the sick fish (I had her warn the store that they had ick) ... which she replied that she would rather try to give them a fighting chance. We all know what stores really do with sick fish. I've heard them say they hospital them and what not but I've seen same stores not care that a fish jumped out onto floor and leave it there till it was nearly dead before putting it back in the water. But at least the store knows that they have sick fish so others don't buy them hopefully.