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Old 08-05-2013, 04:49 PM   #1
Rainer
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Shy cardinals


Over the last few months my school of 7 cardinals has become very shy, hiding behind plants in a corner most of the time. When they're out, they dash for cover at any sign of movement outside the tank. The pygmy cories are a little less shy but still similar. The chili rasboras are completely fearless though.

Back in the winter I was running two T5HOs, a Koralia Nano, and the filter full out. Now I'm using one bulb, no power head, and the filter at a reduced rate, so I would have expected the shy fish to be MORE active, not less.

CO2 is not an issue since I have a thriving breeding colony of SR shrimp, plus a couple of amanos which normally seem to be extremely sensitive to CO2. They're all fat and happy.

Any ideas?
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Old 08-05-2013, 05:16 PM   #2
blesser13
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Do you have other big fishes beside the chili rasboras? I have a school of 12 cardinals and they swim fearless. Actually a little trick is to feed them with some frozen shrimps. Mine they get crazy of it. They will trust you, when they see you = feeding time.
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Old 08-05-2013, 05:34 PM   #3
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The cardinals are the biggest in the tank, slightly larger than the cories and maybe twice the mass of the chilis.
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Old 08-05-2013, 05:37 PM   #4
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Try the frozen food =)
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85 gallons Fluval Osaka, 2x54watts T5H0, Eheim 2217, Fluval M Submersible Heater 300 Watt
Cardinal tetras, Peppermint tetras, Rummy nose tetras, Harlequin barbs, Black phantom tetras, Cherry barbs, Torpedo barbs, Cherry shrimps, Amano shrimps, Albino bristlenose dwarf.
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Old 08-06-2013, 07:50 PM   #5
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Any theories why the cardinals have become so shy while the tiny chili rasboras are partying?
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Old 08-06-2013, 07:52 PM   #6
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add more I had about 7 they hid all the time I added 18 more and they are a fearless gang of neon and now
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Old 08-06-2013, 10:00 PM   #7
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Quote:
Originally Posted by blesser13 View Post
Try the frozen food =)
How are you doing, Karl ? - long time no hear from you.
Sorry to misdirect this thread a bit - just wanted to mention I'm still using a bit of your maple whiskey that's left over from last Xmas - I use a bit of it in several marinades I make for grilled pork or chicken - it's wonderful !
Back to the thread on shy cardinals -
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Old 08-31-2013, 02:25 AM   #8
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Bolstering their numbers did the trick, though they still shy away sometimes when people approach.

I added some cories and chilis too.
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Old 08-31-2013, 02:49 AM   #9
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Well I have had a similar experience with my cardinals. Although mine only became shy after two died.. They finally started becoming less skittish again then another died. When their group becomes disrupted they seem to become more skittish, also mine did the best when I had 11.. They are certainly more skittish then other tetras I have had, I think many are wild caught witch may be a major factor.
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