What Is This? Silver Patch On Molly Fry Help

  1. M

    Morgan Jenkins New Member Member

    Hey guys. My mom's mollies gave birth a month ago. Everything was going pretty well. The tank is 100% cycled, no ammonia spikes, no previous sign of disease... The other day, some of them started getting silver splotches on their heads. It's not fuzzy, no scales are raised, and they seem pretty active. However, some have died.
    This is the best picture I could get:

    Ammonia is 0
    Nitrite is 0
    Nitrate is 200ppm
    Also, I use Prime and aquarium salt (I cut down on that in case it was the problem but nothing's changed)
     
  2. Mazeus

    Mazeus Well Known Member Member

    Is the Nitrate level a typo or is it really 200ppm. If it is, then I suspect this is contributing to the ill health.
     
  3. OP
    OP
    M

    Morgan Jenkins New Member Member

    No, unfortunately that was true lol I'm not really sure about the levels because I don't have to deal with them in my actual fish tank, since I use live plants and everything's always 0.
    Will a water change help? How often should I do one?
     
  4. Mazeus

    Mazeus Well Known Member Member

    Yes, a water change will definitely help. I would do a large one 75% and then do another 50 % change a day or two later to get the nitrates down to a more reasonable level less than 40 ppm