Well, how big is your aquarium? And you shouldnt onlt have a single cory catfish in a tank. What kinds of danios and plecos do u have? Unless your tank is like big, your going to have problems in you aquarium.
If it's a true pictus pimelodus which grows to about 4-6 inches then it MIGHT be fine except they like to school and should be kept in groups of 3 or more so you might need at least a 55 to have a few of them.
The corydoras should be kept in schools or 3 or more as well and they are fine in a tank that size.
If it's a Pimelodus blochii which grows to about 10 inches, then no way as your tank is not big enough for one thing and in the long run it will not be okay with your other fish as it will eat them.
