Rasboras have white film on mouths

[chasely]

After the death of my first Harlequin Rasbora last night I'm afraid I might lose another two tonight.

I first noticed that two out of my five remaining Rasboras have a white film over their mouth.

Please let me know if I should be expecing to wake up to two more dead fish tomorrow or what I can do to stop the death of my Rasboras!!!

Thanks a lot.

 

[Lotus]

It sounds like it might be cotton mouth disease, aka flexibacter columnaris. Lots of info here to help you diagnose and treat: http://www.flippersandfins.net/flexibacter.htm