Re: NANFA-- Temps

Ty Hall (
Mon, 27 Oct 2003 09:45:31 -0600

All valid points Todd, but the examples you give are one time, sudden events. My
contention was more along the lines of constant temperature swings, day in and day
out. This steady up and down, I feel, can contribute greatly to illness and
premature death in fishes. As you pointed out most healthy fish can withstand a
one time sudden change in temp, with little or no ill effects. I also agree with
Moon's original idea that most "tropcicals" can be quite happy in lower temps. I
only think that to be healthy and live long those temps need to be maintained with
some relative consistency.


Todd Crail wrote:

> Well I kinda disagree :)
> I think most fish can take a tremendous amount of variance in their water
> temp. I know 10 degrees F is acceptable... I'd not put 20 degrees + out of
> the question. From quick flashes from a cold rain, to water bursting out of
> the mountains, even to the different currents that ocean fish experience.
> Small stream pools can change temp quickly overnight or with a cold rain. Or
> see how many fish are running in and out of a main system and a much colder
> tributary's waters. I've had patches of water hit me in the stream that
> have made me just shudder. I'd say they're enjoying the temp change, if
> not, the higher DO2 and possibly better foods :)

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