MY FISH HAVE A GREENISH WHITE PATCH AROUND THEIR MOUTHS AND ABOUT 2 OR 3 OF THEM NOW HAVE A DARK PATCH AT THE TOP OF THIER MOUTH WHAT IS THE PROBLEM.

Could you please supply us with a photograph. Also we need your water readings, ammonia, nitrite, nitrate and pH

Did it appear or was it always there?

FOR ABOUT 3 WEEKS

HOW DO I GET WATER READINGS

how do i check readings and how do i send pics?

To test your water reading you can either buy test strips or use the liquid testers(these usually involve at least 2 bottle). The liquid testers are better and more accurate. You will need Ph,Ammonia, Nitrite and Nitrate testers

I am not very good at picture but upload them onto photo-bucket and then put a link to them in the post. I managed it so it cant be hard. If you go to the photo section on here the top post will help you

<a href=" photobucket.com" target="_blank"><img src=" i237.photobucket.com/albums/ff96/nickyd2...195683.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>

need help

A little bit blurred, but I can see what you mean. Do these patches look raised, or like cotton wool? Could be some kind of fungal infection. Problem is, there are loads of different infections fish can pick up. To get a reliable diagnosis of exactly what it is, you'd have to send off samples to be tested. I let other people throw some suggestions but it does rather look fungal to me. You could try some colour fungicide. Go to your fish store and asked them what they stop. I will have a route through my book and see if I can find anything

thanks

Hard to tell from that picture. Buy or borrow a book with fish diseases in it and see if you can match it up with one. I know there is a disease called mouth fungus- it might be that