Re: [RML] Designer Fish

Bruce Hansen (bhansen at ozemail.com.au)
Sat, 14 Nov 1998 08:05:04 +1000

I wonder if that is so Doug - I thought that the big factor in UGF's is
aerobic activity and that oxygen dissolves better at cooler temperatures. To
my mind that would translate into better biological activity when cooler
than warmer. I guess there is an optimum temperature range for this process
but would have to ask more learned heads for the figures :)

Regards,
Bruce.

Bruce Hansen, A.N.G.F.A., Advancing Australian Aquatics.

Bruce Hansen, ANGFA, caring for our aquatic ecosystems.

Please visit us at http://www.ozemail.com.au/~fisher/angfa.htm

-----Original Message-----
From: Doug Collom <dcollom at powerup.com.au>
To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
Date: Friday, 13 November 1998 17:25
Subject: Re: [RML] Designer Fish

>Go ahead Andrew,
>
>Incidentally there's one point I thought of later that's important in an
>unheated tank.
>
>That is that as well as your fish slowing down, so do the beasties in your
>biological filter. Biological filters function best at about 23-28 degrees
>but get progressively less efficient below that. Of course the fish are
>eating less, so their wastes are less too. But the need to avoid any over
>feeding becomes more critical.