I want to keep an oscar with my pbass. I know that the combo doesnt really present a problem but my pbass is only like 3-4". I have him in a 20 gallon to grow a bit while the tank is cycling. I want to go ahead and put my oscar in my new tank and plan to get a small one too obviously. Will the oscar grow faster given his species and larger tank for the time and make my bass lunch? Let me know what you think.