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 | Cardinal Tetras die with the lights off. |
psionic001 Small Fry Posts: 1 Kudos: 1 Votes: 0 Registered: 15-Jul-2006  | Hi, If I have my aquarium lights turnd off for more than say 8 hours, my Cardinal Tetras loose all of their colour and look like they are about to die. They drift about the tank with the current, often ending up caught in plants and under rocks etc. Is this normal? Thanks Matt |
 Posted 15-Jul-2006 18:05 |     |
dan76  Big Fish Always Reading Posts Posts: 343 Registered: 08-Jul-2003  | if they are ok during the time when the lights are on , i would say that they are fine. a lot of fish change their markings depending on light or stress etc. if they dont act normally during the day they might be sick. also how much current do you have in the tank , it could be too strong for when the fish are sleeping cheers dan |
| Posted 16-Jul-2006 04:38 |   |
keithgh     *Ultimate Fish Guru* Posts: 6371 Kudos: 6918 Votes: 1542 Registered: 26-Apr-2003  | Depending on the lighting you have they will naturally change colour when the lights are off. Mine do swim around when there is other lights on in the room, I have never bothered to look when the room is in total darkness. What else is in the tank? Have a look in [link=My Profile] http://www.fishprofiles.com/forums/member.aspx?id=1935[/link] for my tank info Look here for my Betta 11Gal Desktop & Placidity 5ft Community Tank Photos Keith  Near enough is not good enough, therefore good enough is not near enough, and only your best will do. I VOTE DO YOU if not WHY NOT?  VOTE NOW VOTE NOW |
| Posted 16-Jul-2006 04:51 | |
Bob Wesolowski  Mega Fish Posts: 1379 Kudos: 1462 Registered: 14-Oct-2004  | Psionic, The change in cardinal coloration is a natural reaction. It is called sleep. It is nothing to be concerned about. You should see my discus drift during the night, color change is substantial and they drift into odd positions.  __________ "To steal ideas from one person is plagiarism; to steal from many is research." researched from Steven Wright |
| Posted 25-Jul-2006 08:09 | |
Pammy Hobbyist Posts: 148 Kudos: 130 Registered: 30-Mar-2004  | Yeah, they're just sleeping. My Cherry Barbs lose their color and striping when they sleep. |
| Posted 26-Jul-2006 06:03 | |
fish_net Hobbyist Posts: 52 Kudos: 46 Votes: 3 Registered: 16-Aug-2004 | yes its normal,one of my convicts does the same thing |
| Posted 09-Aug-2006 03:35 | |
Calilasseia  *Ultimate Fish Guru* Panda Funster Posts: 5496 Kudos: 2828 Votes: 731 Registered: 10-Feb-2003  | Cardinals undergo a fairly radical colour change in the dark. They are not the only fishes to do this - for example, Beckford's Pencil Fishes have horizontal stripes in daytime, but oblique, almost vertical stripes at night! If they're in a room that's been totally dark during the night, and you suddenly expose them to light, you'll see their night time colours. They probably won't appreciate the shock though!  |
| Posted 11-Aug-2006 04:57 | |
| terka27 Hobbyist Posts: 64 Votes: 0 Registered: 11-Nov-2003  | last night i went to look at my cardinal tetras when it was still dark. they were all almost completely colorless..it scared me to death!. when the light was shining in this morning they were all back to normal. good to know this is normal! |
| Posted 16-Aug-2006 21:42 | |
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