they are very very nice fish, however he will make a meel of those tetras when hes older, looks like a senegal bichir you have there they get to around 12-14inches... and are predatory/carniverous, i had a sengal bichir and a ornate bichir (ornates get to 18inches +) and the senegal was twice the size of the ornate, but the ornate still managed to eat him
Great fish, just be carefull what you keep with them !
Congrats,
Kev