I purchased a 10 cm Red Devil for my 200 liter aquarium. For some time all she did was hide and occaisionally dig. When she dug all she would do is stare at the bottom (her reflection) all day looking lonely and hardly ever eating the flakes, so I decided to purchase another. This one was a male and the 2 fought a little at first, but now with a tank rearrangement (to natural setting) the newest Red Devil knows me pretty well and is always willing to eat whatever I give him (mainly flakes and wafers). The female still hides a lot, but fortunately eats whenever food comes by her. She also is a digging queen, she has tunnels dug all around the bottom of the tank. She is more shy than the male, who is really fun to watch.
I have a Male Red Devil Cichlid that I bought when he was about the size of a small coin. For the first 8 or 9 years of his life he lived peacefully in a community tank with an Angelfish and a Gourami. When the Angel Fish died the balance was upset, and he started beating up on the Gourami. This was in a 100 L tank. I had a new 160 L tank built for the Cichlid, where he has happily lived alone for another 7 or 8 years, without ever having a health problem. He is going on 17 years old; almost ready for college! I wonder how old these fish get to be, my Fred shows no signs of slowing down.
I have had my red devil for almost two years now, he is getting quite large. He is also very beautiful. He is aggressive toward the smaller buttikoferi cichlid that has always lived with him, but when the butti backs its tail into a corner and opens that wide mouth it protects itself fair enough. Though the red devil is the largest fish in the tank (by just a little) it is not the meanest. I have a trimac, or three spot cichlid, he has always been the dominant fish. This is all in a 300 L tank. So keeping reds with other cichlids is definitely not impossible, at least for this amount of time.
I have a red that I raised since he was a little fry. He is now in a 240 liter tank all by himself, of course. Not even a 20 cm long pleco could survive him! He is one little devil, and thats what I love so much about him! He's the best fish ever, period! Now he's about 8 years old and approximately 30 cm long. His nuchal hump is about 1/4 the size of the whole body. He is beautiful!
I have had a Red Devil for 11 years. Fish normally do not get names, but this one is called Big Evil, after the Undertaker. He and his mate bred 6 years ago in a 200 liter, and 6 large red devils survived and ultimately had to be given away. He is very intelligent - once driving an African cichlid into a tube, and then digging rocks to cover up the entrances of the tube, killing the African. In his old age he is somewhat more relaxed. He eats tubifex worm cubes, pizza crusts (only delivery, not frozen) and shrimp tails. Other food it is indifferent to, but will eat goldfish if they stupidly get too close to his mouth.
I have the most beautiful red devil. He is sensational. He is a real work of art, the king of the tank, nobody comes in front of him in feeding or anything. He is about 28 cm in length. He gives my 13 cm green terror a little trouble, but not too much. You have to watch out for this fish’s aggressiveness, he will always want to be the head of the tank. He won't accept anything else and he will fight until he gets there. He is a beauty from the light red scales, to the big hump on his head, and to the tips of all his fins. I would recommend this fish if you want a beautiful cichlid, but you need some other cichlids that can take a beating and hold their own.