I just picked up a 7" Silver for my 180, and he's the only fish in the tank. I bought him from a Petco because it looked like he wasn't getting the care he deserved: fins all messed up, slight DE in his right eye. But at least in the pet store he was relatively calm.
Now, when I come home he hides from me like I beat him or something. I'm trying not to stress him out any further, but he also hasn't eaten in 2 days. Its making me really nervous. He looks really miserable, and I'm not sure why.
I do hope this is just a phase. I'm not sure if it's the new home or just a phase all young silvers go through.