Just when I think things are getting better....... BAM!!! Molly is covered in what I believe to be ich. Gonna get ich guard tomorrow she is currently in my 10 gallon hospital tank ( thank god I had it setup, just knew I had a feeling that something was bound to happen to one of my fish ) She is also 3 years old going on 4 so for a molly that's about average ?
Raise the temp slowly. It will speed up the life cycle of the ich and kill it. Yes, get medicine and treat for ich. You may want to treat the main tank as well with the ich medicine. Glad you separated your molly from the rest, less chance of them getting ich themselves. But always remember that if a fish gets a disease chances are that they all have the same thing. They may not be showing signs because their immune system is stronger than the one who is showing symptoms.
If been watching my main tank no signs of pick on any other fish my molly is doing very well day two of treating with formalin, malachite green, things I have been looking for in my main tank fish rubbing against plants gravel rocks, keeping my molly in hospital tank for at least another week and medicating , once she is well moving back to main tank cleaning hospital tank, when cleaning tank should do 100% water change I have sand substrate just to keep in mind also live plants in hospital tank hornwort cabomba
Also Im not sure if It was ick not sugar like crystals it was as stated above a cyst Almost thinking it is some sort of protozoan parasite of some sort she only had it on her for two days normal activity all my fish are eating fine no strange behavior three other mollys in main tank as well with guppys and loach