For some reason I don't see this working the umbee will be killed or will kill the black nasty or the black nasty will get bloat ive never seen a black nasty +anything the beani will most likely get bloat them and black nasty are very susceptible to this disease and the Grammodes is very slow and would be picked off by the beani I would add a male dovii and some various hardy Nicaragua species like pure amphilophus labiatus and amphilophus zaliosus or other combos and make it a biotope but good luck ill be waiting to see some pics of the monster tank
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