540 Gallon -- Stocking Suggestions

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I happen to like biotopes, and putting together a group of fish and plants that would actually live together in nature, and trying to make it work fascinates more senses for me than just looking in a glass box.
Since you mention trimics, one of those biotopes could be Lake Isabel, in Guatemala.
Although trimacs don't often tolerate the presence of other cichlids when mature, in your size tank it just might work.
These are just some I have kept;
Beside trimacs, Parachromis multifasciatus, and Cincelichthys bocourti are found in the lake (among others)
If all bought and raised together 3 pair might just equitably divide up the tank.
Other non-cichlids from the lake might also add interest, it contains a number of goby species (a couple I have kept, and tend to be ignored by the cichlids I have kept.
Awaous banana
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and Eleotris picta
B70A1A1D-4965-4281-9868-163C5764ADCC_1_201_a.jpeg
There are plenty more non-cichlids like Tetras and live bearers from the lake that could work work depending of the eating habits or your main cichlids
But not just fish, the lake contains a number aquatic plants like Hydrilla and Vallisneria (both of which I'm using in my Panamanian biotope tanks).
0FBC5CA0-5C7F-4D11-8813-E137BF9F212C_1_201_a.jpeg
But this is just one example.
The Nicaraguan Lakes, Lake Amatitlan, Lake Peten or Mexican Cenotes all offer unique lake combinations, and interesting options (not to mention riverine habitats and biotopes).
As you can see for me, its not just about throwing some random fish together that would never encounter each other in reality.
 
Just wanted to mention that I have also done some small African like biotopes like Lake Barumbi mbo that were also quite fascinating, and have cichlids found in no other place in the world.
Lake Bermin is another with its assortment of Coptodons found only in that lake.
I would also think Lake Turkana ( a brackish lake) with Hemichromis, bichirs, Lampreys and barbs, could be an interesting study
 
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Hard no on the Parachromis. I just don't like 'em. I tried a Jag one time, just .... Parachromis are just not a hobby fish to my mind.

BUT, the Bocourti. I like those a lot. And they're tough, too. Maybe if that grows up with a Trimac it'll be OK.

And I'm thinking some A. Citrinellum's, too -- different colors, pretty tough, mean like a Trimac -- those might make it.

And then some smaller fish of some type that are faster/smaller/hide in spots adult Trimac's can't get into. Like some Convicts? Or H. Multispinosa (Rainbow Cichlids) maybe?

And maybe I can keep one or two of the Argentea I already have with all these Amph's as they grow out.

And if I got several Trimac's and watched them grow up, I could perhaps weed out the super psychotic ones and end up with one that's not just totally aggressive all the time like the last one I had.
 
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Disclaimer, I'm a CA newb.. But currently have 7 of my 13 tanks dedicated to CA cichlids after years of strictly SA (mainly dwarf cichlids). I have a group of C. rostratus in with my group of A lyonsi.. Still young (prolly 4-5") but has worked well the last 6 or so months with the different appearance and behavior.. I know trimacs are more aggressive than lyonsi but could maybe try a similar set-up with A. macracanthus along with the timacs as the blackthroats are more robust than rostratus..

Not an expert, but I doubt the sajica could hang.. and I'm not sure about the carpintis but imagine it'd be stressful if you had some real aggro trimacs..
Trimacs imo are a level above the the other two species you mentioned in terms of aggression. The tank is nice and big so you may be able to combine them with enough hiding spots for the little guys. I do think Trimacs would be enjoyable in just a colony of their own kind in this big of a tank.
Though, since you are coming away from a single species tank of big bruisers, might be fun to try a different kind of setup, could do a mix of mid-sized and less aggressive (relatively speaking) species. Sajica, nicaraguense ,HRPs, hericthys species, plenty to choose from, do a whole community. Is what I would try.
Nice to see you posting ragin_cajun ragin_cajun as Neil said long time no see. I haven't been active for a long time but I remember seeing your threads and posts around back in the day.

Not a expert at all when it comes to Trimacs but from what I've heard I'd have to agree with Gourami Swami Gourami Swami (by the way nice to see you still posting too). Tri's seem to be on a level of aggression above many other cichlids. Then again I've seen some beautiful tanks with what are usually thought of as aggressive fish that git along well enough when enough elbow room is given them and a 540 sounds like it maybe enough room to make Trimacs less likely to kill a tankmate. Reminds me of someone I haven't thought of in awhile who I used to love their posts. You guys remember greenterra greenterra He had some nice displays of fish.

Also bkfamus bkfamus mentioned he had a group of Lyonsi and if you don't mind a much less aggressive cichlid that looks imho similar to a Tri, Lyonsi can be quite impressive ragin_cajun ragin_cajun My big male I thought was a looker and very peaceful.
Lyonsi male.JPG
 
If you can make the Trimac's and some other species work it will be glorious....seems like you got a lot of real-estate.
 
I’d take a look at either Cutteri, Spilirus, or chetumalensis as the small fish instead of a rainbow or a convict. The chetumalensis having the most color of the three closely related fish. I’ve found them to be close to convicts in their toughness while looking really good. Perhaps a group of Chetumalensis and a group of HRP would give you a clean look that is very colorful.

for tankmates to The trimac, your idea on the Midas/RD sounds great and the two species are both tough to hang out together in that large tank of yours. Herichthys will also work given the size and scale.
 
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Hi there, I am a newbie on the site, I am in a similar situation as you Ragin Cajun. Just took delivery of my a 2.3m3/600g tank and I am also looking at peoples experiences for stocking ideas as well as aquascaping inspiration.
I'm going to set mine up in a CA biotope theme to capture that natural essence of nature very much along the lines of what duanes suggests. Good luck and have fun with your new venture, It's always exciting starting with a blank canvas.
 
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