msjinkzd;4531815; said:Often velvet will come on from a big cool temperature shift (in my experience).
When I dealt with it recently, it took about 6 weeks of treatment for it to be fully gone. Once the disease is gone, your tank should be fine. I would not move her into a community until she is asymptomatic and treatment has been complete for at least a few weeks. Velvet is a tough one.
Another thing you can do to help with the treatment is turn out the lights.
You may find this article helpful: http://edis.ifas.ufl.edu/pdffiles/FA/FA04100.pdf
This is another link I found helpful: http://freshaquarium.about.com/cs/disease/p/velvet.htm
thank you rachel for that information. i had been leaving the light off because i had heard that too. i still am treating the tank with copper sulfate. ill keep a close eye on it and wait longer. but is it something that can lay dormant? i just dont want to chance it getting into my community sa cichlid tank. and i dont want to leave her in this tank by herself. i bought it as a breeding set up and i want to use it for that.