JASON, VIA EMAIL A: Jeremy replies: A pair of Nicaragua cichlids, Hypsophrys nicaraguensis, would be lovely in a hardwater tank of that size. They colour-up beautifully and have breeding potential too ...

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As a piscivore, it plays an important role in preventing the smaller members of the species flock — the Convict cichlid (Amititlania nigrofasciata) and Hypsophrys (formerly Neetroplus) nematopus — ...