Cory Red Marks

[modern88dp]

only just got into fish recently. had 2 guppies in for 2 week and now added 2 corys, tanks been going about 5weeks all together. one of them has started gettin a couple of red marks on it, i know these are since they both came into the tank because i couldnt tell them apart at first. is this a condition or is it likely to be cutting or grazing itself on some of the ornaments. it didnt seem too well from the moment it went into my tank, it seemed to be struggling to stay at the bottom of the tank and was wedging itself under one of the rock ornaments. maybe i have just been given a fish on its way out? hope not any info will be great. thanks dom

 

[modern88dp]

only just got into fish recently. had 2 guppies in for 2 week and now added 2 corys, tanks been going about 5weeks all together. one of them has started gettin a couple of red marks on it, i know these are since they both came into the tank because i couldnt tell them apart at first. is this a condition or is it likely to be cutting or grazing itself on some of the ornaments. it didnt seem too well from the moment it went into my tank, it seemed to be struggling to stay at the bottom of the tank and was wedging itself under one of the rock ornaments. maybe i have just been given a fish on its way out? hope not any info will be great. thanks dom

also been watching the 2, the one with the red marks seems to be a bit more outgoing than the other swimming through the castle and rocks etc so maybe a result of his behaviour??