cold climate cichlids

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What do you mean by "cold climate"?

I've never known GT's to be 'cold climate' any more than most other Cichlids... Texas Cichlids (obviously) are found a lot farther north than most others, but they are still typically kept at the same temperatures (upper 70s to low 80s) as other Cichlids...

There are many fish/Cichlids that are local to Uruguay which gets pretty chilly in the winter. Being in the southern Hemisphere, it is winter there now. The current 10 day forecast shows evenings down to the low 40s (*F) and daytime temps no higher than upper 60s. http://www.weather.com/outlook/travel/businesstraveler/tenday/UYXX0006?from=36hr_topnav_business

Ken Davis goes to Uruguay in December to collect Cichlids. You can search for posts by him and others to see lists of fish they caught while down there. Ken has told me that some of the Geo species he brings back must be given a 'cold season' where they will stop breeding in order to keep a healthy breeding pair.
 
NC Nutcase is talking about species of Gymnogeophagus, Austroloheros, and a couple Crenicichla. They like to have a cool down period during the winter, temps in the 60s. I believe the water gets even colder than that in parts of Uruguay but you are going to have to ask Ken (fishfarm) or Matt (dogofwar) seeing that they have collected them.
 
H. cynogutalatus (Texas) can take cooler temps, A. rivulatus is from northern S. America, it is totally tropical, All the species of cichlids from Southern Uruguay and Argentina can take temps down to 40F, it commonly freezes there. I froze my ass off the first 3 days we were there on my first trip and then it watrmed up, we go down in December which is early Spring in the southern Hemisphere. Many Gymos can be keep outside year round along the Gulf Coast and the West Coast here in the USA. Best place to find out more about these fish is Felipe's web site. http://www.aqvaterra.com/
I just don't put a heater in the tank and let it fluctuate with the seasons. All my Ururguay fish are breeding right now.
 
Ken covered it! Any of the Gymnos (even Balzanii), Crenicichla Missionera - Scottii - Gaucho - Minuano - Vittata - Celidochilos and any of the local variations of these pikes, all of the Australoheros and even Cichlasoma Dimerus (we found a STUNNING one) can all do the cooler period - within reason of course. You can find a lot of these cichlids in North America now that people like Ken and Spencer (and others) have started bringing them into the hobby with regular trips - thanks guys! I was lucky enough to go down in March and we brought back some cool stuff that should start trickling into the hobby soon. . .

Here is that Cichlasoma (Felipe called it Dimerus - who am I to argue!)

cichlasomaDimerus01.jpg
 
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