Should I change my tank

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I agree with above except that since you appear to want a pair of GT and JD it could very well get ugly even in a 180. If/when they decide to breed a mature pair will likely go to war with the other pair.
Should I keep a divider just in case and I was thinking about doing this
1x gt pair
1x jd pair
1x female rtm
1x Cuban cichlid
1x shoal of silver dollars
Would this work if I have enough sight breakers
 
Agree with everyone else. Keep the GTs and Jacks. They should be fine together in a 180, just give them a lot of sight line breaks and more hides than there are fish. Might want to have a divider on hand for breeding times or after breeding time (males can get a little pushy before females are ready), but I've never had either a GT or JD that became a murderous monster in a tank that big. That RD/Midas is going to claim the whole tank when it's grown and kill anything it sees as competition and then the rest just because.
Agree, I have kept all the fish you mention, or reasonable facsimiles of each genus
and agree your best bets are maybe the GTs, and JDs together in the 180, maybe with some non-cichlid, large/fast dither species to attract attention from each other.
The motaguense with Amphilophines in a tank as small as a 180 is a disaster waiting to happen.
1670596078358.pngThese species each need single species 6 ft tanks of the own1670596023393.png
I have two 180 gal tanks, and would never dream of putting those predatory, and territorial species together in that size tank.
In one of my 180s I have successfully kept 4 Andinoacara coerleopunctatus (smaller close cousins of your GT) but started with 12, and the alfa male hunted down, and killed all other males and few non-receptive females in that size tank when maturity and territoriality.
IMG_0827.jpeg
Even in nature, JDs seldom do well with other more dominant species in the same area.
Below note how torn up the JDs in the video below, they are in an area with more dominant uropthalmus, and this is in thousands of gallons.
027 zps4b102ffd
But below, a larger Cenote where JDs dominate, and share the area with only live bearers, and a few catfish.
Eden2
 
I think the issue with keeping the midevil and rehoming the rest, would be that the midevil would still be just as territorial, or more so, to any new cichlids you drop in. I think the other fish could probably live together just fine. There is still possibility of issues but it would be less likely.
If you keep the midevil, you could maybe do some convicts with it if you give them smaller hiding spots than the midevil could fit in. Anything as large as the midevil would probably be attacked.
I think the last list you posted is too much for the tank. Maybe if you removed the GT pair and got lucky with temperament of the RTM and cuban. But it would definitely take some luck
 
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What if I get rid of the green terror pair and just
1x jd pair
1x rtm female
1x green terror male
 
The problems are the rtm or midevil - they are just too mean to cohab in a tank that size.
 
What if I get rid of the green terror pair and just
1x jd pair
1x rtm female
1x green terror male
Maybe, its a better chance of working. Most people here (myself included) will give prettyconservative advice with cichlid stocking, because it's hard to say if something will work, and usually better to play it safe. Removing the RTM, you would have a pretty good chance of a JD pair and GT working out. However, having breeding pairs at all makes it alot, more difficult; the JDs could potentially claim the whole tank. 1x JD 1xGT 1x Female RTM would probably be better. Even then it's a chance. My advice is t have alot of sight breaks, keep divider on hand, and give it a shot.
 
None of the fish you mention are ever found together in nature, and beyond just geography, there are a number of reasons why, one reason being they would try to kill each other over territory when mature.
So the idea that you can expect them to coexist within the space the size of 180 gals (the size of a culvert) is just not reasonable, because they would cot coexist peaceably in a space with millions of gallons the size of river.
There are a number of cichlids that are somewhat communal, but none of the cichlids you mention are in that category.
For each of those 3 or 4, or more species you mention, each species needs its own 6 ft tank.,
 
Although I hardly ever combine cichlid species when mature (probably why I always kept about 20 tanks, I have stumbled on a few strategies that work (at least temporarily.
One is never to combine predatory species together, or even those with similar jaws, or body types.
Combining these 3 below would be a mistake.
1670624725844.png1670624655399.png1670624605758.png
Those that I have found that work in the same tank, have very different jaw and body types, below are a few that have worked.
1670624873723.png1670624973917.png1670625047499.png
 
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You seem to want to keep the female rtm. Get it it's own tank
That is the only option here
 
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