On the presumption that you are taking about Ctenopoma acutirostre, I say good choice!
I started with a group of five 2cm SL youngsters, but sadly one simply "vanished" in the Rio240 about six weeks ago and then just two weeks ago another one died of no obvious cause in the 540l. The remaining three are growing in size (~3cm SL now) and confidence (at times they show their predatory instincts, yet are pretty oblivious to their current tankmates). I'm really looking forward to the slow development of my trio and hope there is a male (with spines on gill plates) plus two females that will reach ~13cm SL over the space of a few years.