Does anyone have info on julii corydoras catfish?
Well they shouldn’t be alone. Corys should be in groups of at least 3 of their own kind ideally, not a mixed bag of different species (there are over 100 species of Cory). Also the Cory you have is unlikely to be Julii, true Julii are rare but easier to spell than what actually is, C.trilineatus. They do look similar, but the trili’s are more common! They should be in groups, as I said, but a 10g is a bit on the small side for a proper group of Corys, they are best in 20 gallons or larger with a soft substrate – either sand or very rounded gravel – and love meaty food like bloodworms.