Wierd White Mark on Clown

[gatormoto]

Hey everyone,

I've had this black clown for over a year now and today noticed wierd white patches on both of her fins. Has anyone seen something like this before?

http://i1.ebayimg.com/04/i/001/92/3f/e24f_1_sbl.JPG

[heyyoitsnicky]

ich

[gatormoto]

it doesnt look like ich. it appeared overnight and is a white patch on both fins of both clowns... and only on the fins. no dots at all, just one white patch.