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Dither Suggestions
April 30, 2008
6:30 pm
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ndc
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suggestions for a dither - im looking for a dither for my geo tank - they are a bit jumpy as they are in my office and i tend to be quite static when im in there so im looking for something to hopefully keep them a bit calmer - they have to be - south american , lowish ph (kept at around 6.4) , mid to upper level swimmers , good colour ideally and preferably tightly shoaling - ive thought about cardinals or maybe hatchets , any ideas?

April 30, 2008
6:50 pm
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Matt
Málaga, Spain
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Hyphessobrycon columbianus? They're a bit bigger and bolder than cardinals or hatchets and nicely coloured.

Cake or death?
April 30, 2008
8:47 pm
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ndc
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QUOTE(Matt @ Apr 30 2008, 07:33 PM) < {POST_SNAPBACK}>
Hyphessobrycon columbianus? They're a bit bigger and bolder than cardinals or hatchets and nicely coloured.


i always liked the columbianus but im not sure how they behave in a large group, if i get a shoal of tetra id like them to shoal properly , not just kind of hang around each other ! i may still go for the hatchets as when i had large groups of them before they had the strangest behaviour - they would all stick together but they would push 2 fish out either side of them - one about 5 inch from the main group and another another 4-5 " after that, they wouldnt let these 2 back in to the group (and the middle one wouldnt let the outside one back to it) unless i went into the tank and then they would all ball up together, when the 'attack' finished they would then separate out again and take up their patrols (it was always the same 2 fish) - this was only in a 48" x 15" tank and id like to see if they replacate this behaviour in a larger tank. actually thinking about that now im definately going to get a group - the minimum needed for this behaviour to occur seems to be about 15 so ill get a group of about 20+ and see how they go. im guessing that in the wild (the fish were wild caught g.sternicla i think) they use it as a defence mechanism, pushing the older fish to the outside of the group

May 1, 2008
7:00 am
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Matt
Málaga, Spain
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Interesting theory Neill, not one I've heard before. It was definitely the same two individuals involved each time?

Cake or death?
May 1, 2008
8:13 am
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ndc
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QUOTE(Matt @ May 1 2008, 07:43 AM) < {POST_SNAPBACK}>
Interesting theory Neill, not one I've heard before. It was definitely the same two individuals involved each time?


definately and it happened on 2 occasions with 2 different sets of fish, i couldnt tell 100% with the first set if it was the same 2 fish but with the second set it was definately the same 2 as they were visably different (just slight differences) but i paid more attention to the 2nd group after seeing the first group, the fish were from 2 different imports a couple of months apart so it couldnt have been some kind of 'learned' behaviour

May 1, 2008
12:02 pm
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Matt
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I'm intrigued. Will check through a few papers and see if this is mentioned officially anywhere. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

Cake or death?
May 1, 2008
1:44 pm
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ndc
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QUOTE(Matt @ May 1 2008, 12:45 PM) < {POST_SNAPBACK}>
I'm intrigued. Will check through a few papers and see if this is mentioned officially anywhere. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />


it was very interesting to watch - i should have taken some video or something at the time but nevermind

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