The best tankmates are other frontosas. They grow to 14" as adults and will attempt to eat anything that will fit in their mouths. However, you can sometimes get lucky. The best way is to grow up juveniles with the tank mates and that way they may get used to them and not view them as food. Potential tankmates are Altolamprologus calvus or compressiceps but if you want colour then possibly Leleupi or cyprichromis. Cyps are their natural food in the wild, but if you have juvenile fronts and adult cyps they may be ok for a while - no long term guarantees though. My cyps lasted about 4-5 weeks before they were munched. You have been warned.
Also remember that adult fronts will need a tank of at least 5'.
Also remember that adult fronts will need a tank of at least 5'.