Guys are fascinated by aggressive cichlid and there are numerous threads on the subject. Let’s change the polling on which cichlid are least aggressive. Here is my take based on my personal experience. What is your experience?
Malawi: Yellow Lab and Pseudotropheus saulosi. These are dwarf MBUNA I have kept in group in my planted 75 gal with no significant fighting or casualty ever.
Tanganyikan: Frontosa and Lamprologus tretocephalus. I have kept a Single Frontosa in my planted 125g mixed cichlid community for 10 years and it has never bullied smaller tankmates. Front are typically kept in colony in bigger tank. I keep a colony of L. tretocephalus (aka mini Front)with my Front in my planted 75 gal and they get along and breed regularly.
Non rift lake African: My Kribensis colony breed regularly and self sustain a population in my planted 75g for years. Jewel cichlid are typically aggressive, but I am able to keep a breeding group of Hemichromis exsul in my planted 125g for years with no significant fighting.
CA: Rainbow cichlid is a dwarf CA I have kept peacefully long term in my 75g. Vieja synspillum and Jack Dampsey were peaceful and somewhat timid in my 125g until they reach sexual maturity.
SA: This continent has the most peaceful cichlid. The list of peaceful cichlid is long. I have kept angel, discus, severum, geophagus, acara and so on.
Malawi: Yellow Lab and Pseudotropheus saulosi. These are dwarf MBUNA I have kept in group in my planted 75 gal with no significant fighting or casualty ever.
Tanganyikan: Frontosa and Lamprologus tretocephalus. I have kept a Single Frontosa in my planted 125g mixed cichlid community for 10 years and it has never bullied smaller tankmates. Front are typically kept in colony in bigger tank. I keep a colony of L. tretocephalus (aka mini Front)with my Front in my planted 75 gal and they get along and breed regularly.
Non rift lake African: My Kribensis colony breed regularly and self sustain a population in my planted 75g for years. Jewel cichlid are typically aggressive, but I am able to keep a breeding group of Hemichromis exsul in my planted 125g for years with no significant fighting.
CA: Rainbow cichlid is a dwarf CA I have kept peacefully long term in my 75g. Vieja synspillum and Jack Dampsey were peaceful and somewhat timid in my 125g until they reach sexual maturity.
SA: This continent has the most peaceful cichlid. The list of peaceful cichlid is long. I have kept angel, discus, severum, geophagus, acara and so on.