From my experience - Beani aren't bad when small. Grammodes tear into tankmates as soon as possible.
Cuban males can be hard on the female. But, not nearly as bad as a Red Devil or similar species.
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I love my grammode, he was a pure killer straight out the box though. Killed off the other 4 I bought with him, as well as my full grown Senegal bichir. (that one stung a little).
I feel like they are not to often seen any more. Probably due to the painfully slow growth rate. Have had mine since start of June, 2", he is now 4".