I bought 3 chromis a few days ago(Friday), did my acclimation and added them to the tank. Saturday, one came out and was very active and eating. The other two has not came out yet. Even today, I have not seen the other two, so I'm a bit concern. These chromis are about 1". Currently, I have 2 maroons, 1 blue tang, 1 yellow tang, 1 Lyretail Anthias, 1 Harlequin Tusk. Maybe they are still hiding and I'm just being paranoid. When should I be really concern? Thanks in advance.