What fish to cool and fast flowing water?
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Old 12-11-2004, 07:05 PM   #1
thapsus
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What fish to cool and fast flowing water?


So, which shoalingfish (or other) would like cool water, 23-24C and quite fast flow and to a small tank, 80 l? Other fishes are 2 borellii cichlids and 2 spotted hillstream loaches (gastromyzon punctulatus).

White clouds....too warm, neon tetra looks boring to me because it is so common, espes rasbora could be nice but is water too cold, normal harlequin rasbora maybe, how about danios................

Ideas, please.

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Old 12-11-2004, 09:18 PM   #2
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small fish would be white clouds. they come from cooler climates. i have a setup that is a planted slow stream tank 20 g with 8 highway catfish and white clouds at a temp of 72 give or take.
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Old 12-11-2004, 10:49 PM   #3
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I suggest looking at zebra danios.
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Old 12-12-2004, 12:36 AM   #4
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I agree with White Clouds. Very pretty fish that should do well in cooler water.

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Old 12-12-2004, 01:22 AM   #5
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White Clouds... perfect!
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Old 12-12-2004, 02:44 AM   #6
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Here's another vote for white clouds.

BTW, is there a reason why you're looking for a cool water species, especially w/the Apistogramma in there? They prefer much more tropical waters...
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Old 12-12-2004, 09:34 AM   #7
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Here is some info pages, information about borelliis is often inaccurate.

http://www.fishbase.org/Summary/Spec...sname=borellii

http://www.fishbase.org/Summary/Spec...me=punctulatus

http://www.plantedtank.net/fishprofiles/104/

http://species.fishindex.com/species...eam_loach.html

http://www.aquariumsite.com/fish/borellii_dwarf.php

http://www.fishandtips.com/displaydb.php?ID=13

I have other, warmer tanks I could put borelliis.

I really like white clouds, but I think my tank is too warm for them. Just to make sure, the temperature in my tank 24C is 75F.

In this page
http://www.google.fi/search?q=cache:...=fi&lr=lang_en
you can find the river temperature (in the bottom of the page, little top of the map) 76F. So is 75F too cold? This river is exactly where my pantanal borelliis should be from if they are wild caught.

Gastromyzon punctulatus can be found from Borneo, from Indonesia and Maleysia and more accurate from Senapat River, Baleh River and Segama River. Feel free to find temperatures in those rivers.
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Old 12-12-2004, 05:58 PM   #8
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You're currently keeping your tanks at 73-75F. The Pantanal is a very large river system and the each of its tributaries varies. FYI, A. borelli comes from waters where the temperature ranges from 20-30C (68-86F). It's a very adaptable species. What's interesting is the influence pH and temperature.

The gender determination in this species is highly determined by both the pH and the temperature of the aquarium (correlation is at 79%). At 23C (73.4F), the average % of males are as follows:
pH 4.5: 39.6%
pH 5.5: 37.1%
pH 6.5: 32.8%
As you can see, as the pH rises and the temperature remains the same, the ratio of males to females drops.

Here's the gender determination at 26C (78.8F):
pH 4.5: 68.4
pH 5.5: 53.9
pH 6.5: 68.4

At a higher temperature, the sex ratio balances out at around a pH value of 5.5. Unless you're modifying the water to hit the 5.5 mark, this really isn't achievable.

Gender determination at 29C (84.2F):
pH 4.5: 85.4
pH 5.5: 73.6
pH 6.5: 61.4

At this high temperature, at a pH value of 6.5, the sex ratio is slightly skewed towards males. If you'll noticed, however, as the pH rises, the % of males drop. It actually becomes even more balanced at a higher pH value. At the pH values that I've been keeping my tank at (6.8), the ratio hits close to the 50% range.

Unless you're not worried about breeding these guys, the above information is irrelevant. Otherwise, cranking the temperature up helps.
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Old 12-12-2004, 06:08 PM   #9
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Quote:
Originally Posted by thapsus
I really like white clouds, but I think my tank is too warm for them. Just to make sure, the temperature in my tank 24C is 75F.
They would do just great. I had them from 13 to 28C and they just slow down when it is colder and probably burn out faster at higher temps. 24C would be perfect.
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Old 12-13-2004, 06:57 AM   #10
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Thankyou ibn, this is just the information I aspire to know. I have separate tank for breeding my fishes, and there I can set the temperature perfect. I don't want them to breed in their real tank to avoil sligtest agression towards other fishes. It's also too stressfull to me to watch fry being ate.

And thankyou wasserbest, that relieved my mind.
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Old 12-13-2004, 07:00 AM   #11
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Call me crazy, but otocinclus is a schooling fish that likes cool & fast flowing water
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Old 12-14-2004, 08:30 AM   #12
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I don't call you crasy bigbow but, otos would take too much room from borelliis. Otherwise good suggestion.
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Old 12-14-2004, 01:20 PM   #13
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Another vote for White Clouds. I keep my tank at 74 with increase to 76 by the end of the photoperiod. I had the tank at 80 for a period of two week while treating Ick with no ill effect on the fish. I think as long as your other water parameters are in line ( PH, NO3, NH3/4 ) they'll be just fine.
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