395 for an eupterus?!?!
Decorus aren't a rift lake species, they're a river fish. They would adapt to the water well enough, but they do grow to over 12", and are a social species (unlike most large river Syno's). The price (in Oz) of a tank large enough for a group of them plus the fish would probably cover a late-model car, or at least a decent downpayment...As for the original question, if you love Decorus so much why not build the tank around that fish? Go with an African tank with crushed coral substrate and you will be just fine...