Red Terror

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Could I do 1 red terror in a 112 gallon tank?
Let's make sure we are talking about the same fish first as there are Two different fish that have the common name of Red Terror.
1) Mesoheros Festae
2) Cichlasoma urophthalmus ( Mayan cichlid commonly called Red Terrors as well)
I am talking about Mesoheros Festae here.

A single female would as she will get to about the 12in mark. A Male needs a 2ft wide tank as they are know to get to 16in.

That is why I have not got them myself. The males potential size. These fish really don't have their vibrant colors except when in a pair and breeding. Each has a subdued coloration they wear when not that is vastly different than what the normal Red Terror (Festae) picture shows.

The Mayan also a big cichlid, is in the same boat as the rest a single fish for your tank.
If you are wanting a pair? Look for something in the 10in adult size range.
 
Let's make sure we are talking about the same fish first as there are Two different fish that have the common name of Red Terror.
1) Mesoheros Festae
2) Cichlasoma urophthalmus ( Mayan cichlid commonly called Red Terrors as well)
I am talking about Mesoheros Festae here.

A single female would as she will get to about the 12in mark. A Male needs a 2ft wide tank as they are know to get to 16in.

That is why I have not got them myself. The males potential size. These fish really don't have their vibrant colors except when in a pair and breeding. Each has a subdued coloration they wear when not that is vastly different than what the normal Red Terror (Festae) picture shows.

The Mayan also a big cichlid, is in the same boat as the rest a single fish for your tank.
If you are wanting a pair? Look for something in the 10in adult size range.
yes, #1.

I read the the Green Terrors Aequidens rivulatus would get up to 10-12 '' in the wild. would they work?
 
yes, #1.

I read the the Green Terrors Aequidens rivulatus would get up to 10-12 '' in the wild. would they work?
GT's just might work for your tank.
I would get six youngsters around the 2in mark and raise them together. Nature will take its course and eventually a pair will form. Then you can rehome the rest. Or keep as back ups in another tanks.
Now cichlids are like us, no two are the same. You can get a bunch of nice guys that get along or you can get that one who hates everything and wants to kill and eat it.
 
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GT's just might work for your tank.
I would get six youngsters around the 2in mark and raise them together. Nature will take its course and eventually a pair will form. Then you can rehome the rest. Or keep as back ups in another tanks.
Now cichlids are like us, no two are the same. You can get a bunch of nice guys that get along or you can get that one who hates everything and wants to kill and eat it.
So with a pair I could do fine?
 
So with a pair I could do fine?
I will say that your chances of success is a lot higher. As GT males while said to range to 12in tend to stay around 10 in the aquarium, females 8. So while I would prefer a 6ft 125, I can see the 5ft working. Just be ahead of the game and make a separator and have it ready.

Most make them out of light diffusers from home improvement centers.

 
I agree with Jexnell, fullsizeoutput_120f.jpeg
GTs or any of the other Acaras (genus Andinoacara) would work well in your tank.
Above female Andinoacara coeruleopunctatus, below young male (about 5").
fullsizeoutput_fe3.jpeg
I also agree if by Red Terror, you mean festae a female would work, but your tank would eventually become quite cramped for a male. and divers are almost always needed for a pair.
The 6 ft tank below became too small for the male.

Sometimes without a male around the females take on a more drab coloration than most photos show.
Below is the same female as above, without a male in the tank.

The other Red Terror Mayaheros uropthalmus also get quite large,
Below a video of how they live in nature, note the usable space.
Azul imovie edit
 
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