Don't worry about the age question, just curious. I'm still curious though.
You have a lot of fish that are going to be getting pretty large. The shovelnose catfish gets 18-24" & will eat anything that isn't big enough to avoid being on the menu. It is also an soft, acid-loving, Amazon fish. The moray is definately BW-SW. So is the puffer & the puffer will either make lunch of the eel, or be lunch to the catfish. Puffers belong in species only tanks. I would get rid of the knife & catfish, put the eel in another tank & get some more GSPs.
You have a lot of fish that are going to be getting pretty large. The shovelnose catfish gets 18-24" & will eat anything that isn't big enough to avoid being on the menu. It is also an soft, acid-loving, Amazon fish. The moray is definately BW-SW. So is the puffer & the puffer will either make lunch of the eel, or be lunch to the catfish. Puffers belong in species only tanks. I would get rid of the knife & catfish, put the eel in another tank & get some more GSPs.