Growing small Angels with any other small fish will not remove what is an instinctual response from the Angel toward a smaller fish when it gets full grown. The likelihood can be reduced maybe, but nature doesn't really work like that. I used to sort of go by that myself until I saw two separate Angels suck in a Cardinal Tetra. They usually don't pursue these fish I think, but if one happens to swim in its face the Angel finds it very hard to resist.
If you keep these smaller fish in larger groups I think it helps. In my 125g with 4 Angels I have about 100 Cardinals, Cherry Barbs, Rummy-nose Tetras, Bloodfin Tetras, Otos, Cories.
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