I've just finished stocking my 10gal (fully cycled) low tech planted tank.
3x Salt and Pepper Coreys
6x Harlequin Rasboras
1x freeloading baby snail
Everyone seems to be getting along well, however over the last week one of the Harlequins has started hiding in the back away from the others. Some times she will swim about with everyone, but just as often she will lurk behind plants or behind the filter intake. Water perimeters are fine, do you think she's just a loaner? I haven't seen anyone being mean to her, should I worry?