I have recently inherited a 16gal/ 64ltr fish tank from a neighbor who is moving away and can't bring her fish with her. Inside are three Barbs and/or Danios (she isn't sure.) and one Corry Catfish. I understand both of those fish are schooling fish and especially Corry need some companions. I do not mind getting more in order to make these fish happy, but as this is my first tank and she knows nothing about the fish she's been taking care of I am hoping to get some advice here. Anything you can tell me will e very helpful.