Well I have to completely disagree with all of the nay-Sayers. I have read a lot of the posts explaining why this or that did not work for this person or that person. I have responded many times to these posts. Yes there is a potential for a fish to snap at night and kill. Just curious why none of this has happened to me. I have all community tanks, all of the inhabitants have grown up together or with a group of other cichlids before being transferred into their eventual tank.
My 300 is home to (all fish are over 8") Hogabooarum, Devils, Loisellei, Kraussi, Pikes, Grammode, Urophthalmus, Hon. Jag, Beani, Heterospila.
My 250 is home to (all fish are 5" or larger) Argentea, Black Belt, Zonatus, Bifa, Fenestratus, Catamaco, Polys, Regani,
My 210 is home to (all fish are 5" & larger) RTMS, La Ceiba's, Freddies, Dovii, Carpintis, Cuban
My 150 is home to 30 different grow-outs of various other different species.
And please dont respond to what I said with, dude you are so overstocked. You have not seen my set up and I have plenty of filtration and keep up on the water changes. I breed several different types of all these cichlids and distribute them throughout the state of Washington. Id like to think that I do know what I am talking about. Though I do have people visit my fish room all the time and can not believe that my tanks are so peaceful. I understand that a lot of you have had serious issues with psycho fish, and maybe I have been lucky. But I have 27 tanks and over 75 different species, and all of them co-exist or co-existed before I pulled them to breed them.
If that is what you want as a community, start them young, feed them well, interact with them often and you will have very good success.
It's likely BECAUSE you are so heavily stocked that they are co-existing, the old JDM trick... Have enough fish and no one can focus on a specific fish to actually cause damage and no real territories are made. Same reason you see pet stores pulling off the stock they do. It can work, you might have issues later, but my main problem with that many fish for MY tanks is you don't see a lot of natural behavior in something that heavily stocked. I'd rather have a nice pair or two in a 300 gallon than a bunch of different fish. But it's a personal preference.
The one real rule of cichlid communities is that nothing will or won't work 100% of the time.
lol