Two of my girls have a really thin white string hanging from their stomachs. I have put coppersafe in the water, because one of the girls looks like she has ich. That is supposed to be for parasites, but these have developed since I put the coppersafe in. What are they, and how can I treat them? The one on Ariel is about 1/2 inch long, and the one on Diva is about an inch. I just finished cycling the tank and am getting ready to do a water change.. is there anything else I can do?