alright ive revised my plan, I think 3 red tailed barracudas and 3 african knives might work, not much else. from what ive read the knives are too big for the red tails, red tails are 12" max ive read and african knives are 8-12" max, well beyond two thirds the length of the redtails which can eat fish two thirds there size, so, what do you think, would that work