ok so i went to petsmart buying fish for my 1st tank (a 13 gal. freshwater) after it had been running for a week. The employee was very helpful and i got 3 guppies and she suggested this julii, it was in a small tank with only guppies and no other catfish at all so i said yes and took them home. immediatley the julii swam up and down the walls of the tank etc. the next day i noticed it was innactive and just starring into the corners of the tank not moving. that night it swam up and down the sides when i turned the lights off but i never see it nosing around through the bottom like it was in the store. i dont think it is eating much because the guppies end up eating the bottom feeder pellets i put in for him. in a few days im getting 2 mystery snails and 2 dwarf gourami, will these make him perk up or should i get another julii (it is a real julli corydora not a false or three-striped corydora) ... help please!!!!!