Pretty sure the eel will outgrow a CB Senegal. Where are you getting the size/info from, just curious. If you’re open to upgrading to a bigger tank, you’re selection gets much bigger.
I believe the OP is referring to one of the smaller growing spiny eels of the macrognathus clade, not the larger growing mastacembelus eels. But i could be wrong.
Biggest problem with a smaller eel is that it will struggle to compete for food in a tank with the other inhabitants mentioned imo.