Rescued silver aro / help

Today I brought home a 10 inch silver who has taken a beating from a big one..for the last week she was in the lfs, in a tank, I believe with some sort of antibiotics....anyway..her barbels are gone, one eye is totally cloudy, she looked awfull..she has improoved somewhat and is eating pellets... as said I brought her home, put her in a big tank, alone...now heres what makes me wonder..she swims majestically, for a while, then she lied down, sometimes even like a piece of cloth on the ground or draped over bogwood..then she started swimming again..always near the bottom of the tank , and she hides in the middle of the bogwood, of which I have tons, really hidden and peeking out..then she takes another swim, near the bottom, and hides again...tens of aro's of every kind ( except afrivcan ) never had this behaviour before. any hint? any suggestion, please?

she already is better..swims calmly, beautifully, but only from the middle of the tank down...is blind from the right eye, I think..I saw er aeting pellets at the store, but then again she was swimming at the surface which she hasn't yet...She is beutifull, any way..it cost me 60 Euros to save her, would you believe? I just simplly could not let her there..

Obrigado, Sr Dotor Cariba!! Thank you for the kind words..Aro is marvellous now, although still evolving around mid tank..