Hi Mg20000,
I think not much members here keeping this species, and very rare that to share the frightening look of the Polypterus ornatipinnis if I'm not wrong. This species may eat or bite larger fish in the aquarium and it can grow up to 60cm in size. In order to setup your tank, common plants like anubias nanas, rosette, java fern more on the hardy types of plants. Also using BW or DW as part of the decoration. Either bare foreground or with tiny stone gravel 3-5mm type. Can visit this site which might give you some idea.
www.youtube.com/watch?v=M-CyN8itWAk.
Hope you enjoy it. Cheers
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