i suggest german blue rams! theyre so pretty, and i think they are smaller than bolivians, correct me if i''m wrong. although they are more sensitive and harder to keep alive. i've kept 1 of the 2 that i originally got alive, and i'm a complete fish n00b, so that's saying something.
bahaha i also got one plant from petco that i think's the same as yours. it's still thriving but i havn't seen much growth in the 6 months that ive had it.. but then again i had it in a very low tech tank. I did however see the same plant and it was very tall in one of the local LFS here. so who knows. i've been wondering what kind of plant it is..