Ok so the eel will work with a betta though? because since their a carnivore and how big they get i was kinda afraid that it would eat my betta....theres a kinda of pleco that i saw at a pet store i think it was called a clown pleco would that be fine? Also is there one cory thats better than others? Because i personally like the emeralds..Thank your for all your help i really appreciate it..