Re: [RML] Minimum temperatures

Roy Hunter (roy at
Tue, 29 Jul 1997 08:16:04 -0600

Dramatic temperature changes of 10 deg C. every day is a sure way to stress
and kill your fish. Tatei, fluvitilis, and duboulayi can handle long
periods of 10 deg water. I think in northern Germany you would have a very
hard time doing this unless the pond was in a heated greenhouse.

Larger volumes of water are better than small. Larger volume holds the heat
better than smaller.

Roy Hunter
ANGFA of North America
visit the ANGFA website at:
reach me at:
roy at

> From: Patrick Aldag <aldag at>
> To: rainbowfish at
> Subject: [RML] Minimum temperatures
> Date: Tuesday, July 29, 1997 6:40 AM
> The recent discussion about minimum temperatures for keeping rainbows and
> article in a german magazin (about keeping Gymnogeophagus in an outdoor
> ) made me wonder if any of the (north)europeans on the list - and I know
> that there are some ;-) (even germans) tried this.
> How long can bows stay a temperatures of 10 degreee C - this must be an
> absolute extreme, isnīt it ?
> Does anybody of you have experiences with black plastic tanks with a
> of approx 90 liters? This is what I want to try if possible. I think they
> will get much warmer than a pond so it should be possible to reach
> temperatures between 15 and 20 degr. C or more during the day.
> Thanks in advance
> Patrick Aldag
> aldag at