As others have said it won't work, any success would be extremely short term. Even if you had an aquarium of sufficient size and you began with a smaller RTC and larger Chocolate the tables would turn quickly, that goes for the PBass as well. Chocolates are pretty mellow and aren't real aggressive eaters so even before predation by the quicker growing PBass or RTC became a concern they'd probably out compete the Chocolate for food.
