Sorry for the cut and paste job but:
If it looks like specks of salt it's most likely ich - It will get steadily worse. And it will be very harmful if not checked soon.
Ich parasite dislikes warm water, so bring the water up to 84ºF just over 30ºC. (slow and steady temp raise - I cranked mine up by a couple of degrees every hour and a half or there abouts)
Read up on Ich - It's easy to cure but don't be tempted to dose your tank - You'll kill the ich - but could also kill some fish. If you catch it early, your fish will be fine. Leave your tank running hot for a couple of weeks and once you have a few few completely Ich free days, you can start to lower your temp.
Another good idea is to add a little salt to your tank as a tonic to your fish. as for ammount of salt, use the chart on the box of salt or just ask someone here -I don't know what size tank you have but when I add salt to my aquarium, If I'm honest it's usually guesswork!
Frequent water changes are a must - Due to the ich parasite being suspended in the water at certain stages in it's life cycle - If you drain water away, you will undoubtedly be draining away ich parasites that you can not see with your water. The more the better!
If you do dose, only do so as a last result and be aware that scale-less fish are very succeptable to poisoning by such medications and you will have to remove any charcoal filtration. I strongly advise you don't dose with any meds though as you want to avoid any un necessary chemicals in your tank.
I got Ich on my first week of fish and lost a couple before I learned about the tank tem treatment method - it saved my fish within days.
Please pm me if you have any queries or need advice. I'm on most of the day so I'll get back to you promptly.
Try these for refrence:
http://en.wikipedia.org/wiki/Ichthyo...us_multifiliis http://www.fishlore.com/Articles/CuringIch.htm
There is lots of Ich info out there if you look for it, and there are a few threads here re this same problem. It is very common and I'd say everyone will experience this at some point. It's brought on by stress / poor water quality. So check your set up and you should be fine.
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Coloring or Ich