Arroyo batovi water parameters

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Hi Guys can you help me get sone info about Uruguayan rivers. Mainly about water temperature changes and also some basic water parameters?
Asking on behalf of a friend. He is keeping this - gymnogepohagus Batovi sp. Blue and gymnogepohagus terrapurpura.
We know that water temp is changing depending on the season so the question is - is it crucial to adjust water temp to imitate winter months?
 
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Yes, in most cases if you do not give the cichlids from temperate South America a cooldown period they tend to get weird bacterial issues and whatnot. They seem to waste away. I ran into this issue with some Australoheros. An unplugged heater in winter months is probably adequate in most places, but I’m in Florida so I started putting mine in a small pond in the garage.
 
Yes, in most cases if you do not give the cichlids from temperate South America a cooldown period they tend to get weird bacterial issues and whatnot. They seem to waste away. I ran into this issue with some Australoheros. An unplugged heater in winter months is probably adequate in most places, but I’m in Florida so I started putting mine in a small pond in the garage.
So what woukd be the good water temp for winter months. Would typical room temp be ok? Lets say 20C ? Or it needs to be lower, my friend lives in Poland so outside teperature are really low during winter .
 
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When I kept lots of Uruguayans, no heaters were useds so temps could naturally drop into the low 60s'F and even into the 50's on my 1st floor in winter.
For those that were kept outside spring through fall in WI, and brought in, in months when the pond froze over (Dec the Mar), , they were put in an unheated basement where low 50'sF were the norm.
The basement floor would get very cold during below zero WI winters
But it may depend on which species are kept. (more northern (warmer) or more southern areas of Uruguay and Argentina (cooler)
I tried the more northern species, Gymnogeophagus balzani in the coldest basement kiddy pools (lowest temps) and they didn't handle the lows,
But the more southern Gymnos, like quilero, and Paso Pache Crenicichla, and Australoheros did fine.
Warming temps in spring would trigger spawning.
Below, Gym sp Paso Pache
Below quilero (AKA Yerbalito
 
When I kept lots of Uruguayans, no heaters were useds so temps could naturally drop into the low 60s'F and even into the 50's on my 1st floor in winter.
For those that were kept outside spring through fall in WI, and brought in, in months when the pond froze over (Dec the Mar), , they were put in an unheated basement where low 50'sF were the norm.
The basement floor would get very cold during below zero WI winters
But it may depend on which species are kept. (more northern (warmer) or more southern areas of Uruguay and Argentina (cooler)
I tried the more northern species, Gymnogeophagus balzani in the coldest basement kiddy pools (lowest temps) and they didn't handle the lows,
But the more southern Gymnos, like quilero, and Paso Pache Crenicichla, and Australoheros did fine.
Warming temps in spring would trigger spawning.
Below, Gym sp Paso Pache
Below quilero (AKA Yerbalito
That’s a very complex answer, thank you very much for that.
 
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