I have kept 2 species from the gymnogenys group, sp. Rio Yerbalito, and sp.Paso Pache.
Never experienced aggression problems with either.
I never used tanks for a group, any smaller than 6 ft , and only kept one species of the genus per tank..
The groups were always 1 male, to at least 3 females, and if a female was holding, she'd get her own tank.
I never used heaters in their tanks, just going with room temp.
![1677790981936.png 1677790981936.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269575-37ff5b5b39691110b77388bf18f28124.jpg)
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![1677790889063.png 1677790889063.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269574-455fa64dec0d0c2809e97268dd527f55.jpg)
Above are species "Paso Pache'
Inside they were held in a 125, using Mexican high altitude live bearers as dithers fish, they were also kept outside in a 300 gal rubbermaid where they spawned.
Below species Rio Yerbaito, kept in a 125, but female moved to a 50gal when holding
![1677791168070.png 1677791168070.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269576-608bda7f62a8f6cf05d4e48d9012ee69.jpg)
![1677791318335.png 1677791318335.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269577-fde7542c9fc39ef0198dc6d1f20e7c7c.jpg)
They were also kept in a pond spring thru fall, brought into a 400 gal kiddy pool in winter
![1677791658042.png 1677791658042.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269579-cf8cd30b39d400bdc0ce9a02e0a89270.jpg)
![1677791517296.png 1677791517296.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269578-c1a5af075db83e3c75ada5db5bccaa31.jpg)
I did keep a group of Rio Yerbaito in a 125 Uruguayan cichlid community tank, with Australoheros "red Ceibal, and the Uruguayan pike cichlid variant of
, Crenicichla saxatillis. It was on a north wall, with no heater.
![1677791861103.png 1677791861103.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269581-6301612fc93be26fe1639d537094a975.jpg)
![1677791818496.png 1677791818496.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269580-0e41d57366decd6d9ef3f2a253bb93c8.jpg)
![1677792080208.png 1677792080208.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269583-520c4969e5b14b752642815369495946.jpg)
When brought in after a summer outside in the fall colors were quite striking.
Male left, female right.
![1677792338348.png 1677792338348.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269584-0c0f7334dc7967dce0c3e0095f02fad9.jpg)
![1677791893074.png 1677791893074.png](https://www.monsterfishkeepers.com/forums/data/attachments/1269/1269582-520c4969e5b14b752642815369495946.jpg)