Not many plecos will eat algae but i wouldn't put one in a tan that size with an oscar. If you really want an oscar then that will be all you can have in the tank unless you get a tank bigger than 75g.
I think oscars are great fish with loads of personality, mine used to jump out of the top of his tank to tank food from my hand.
I think oscars are great fish with loads of personality, mine used to jump out of the top of his tank to tank food from my hand.