PlanetCatfish.com

Hi, everybody! I am new at your website. I have few tanks with different fish. Two plecos, three african upside-down catfish, two peper cory (and some of their babies), seven cory julii (still do not know, are they fake or not), 9 neons tetra and a lot of guppies.
what worry me now is my africans: white marks, like scratches on the sides and around anus, anus and other privet hole is irritated, looks like bleeding on one of them. Any ideas, what could it be?
Thank You,
Sincerely, Irine ( irinefish )