Ripped Fins?

[catfish4ever]

Hi guys! well i've just finished a water change and for a while now i've seen that my sterbai corydoras has some, well... ripped fins? his dorsal is practically in two, along with his tail in a kind of split in two, munched shape. Any help would be gladly Appreciated. the current residents are in my sig. the other two corydoras are bronze cories. Please help. Thanks guys!

Ps: UPDATE. I think it might be the Rainbow. However not sure

 

[england]

Golden sucking fish or the bristlenose plec IMO...Good water changes should cure this quite quick.

you do have a plan for the future with the iridescent shark?

 

[catfish4ever]

Golden sucking fish or the bristlenose plec IMO...Good water changes should cure this quite quick.

you do have a plan for the future with the iridescent shark?

Thanks for reply. Really? didn't think it could be them as much as the rainbow. cautious on the loach though. and yes i will hopefully get a bigger tank in the future just for the iridescent shark. . please no slate.