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Posted by Topic subject:   Pirahnas and Light
krajus40
New Member

Posts: 2
From:Williampsort, Pa, USA
Registered: Feb 2003

posted 02-13-2003 11:05 AM     Click Here to See the Profile for krajus40   Click Here to Email krajus40     Edit/Delete Message
Hey guys its me again,
I got your last messages, and yes soon I will be buying a 55 gal tank. I was wondering why red bellied pirahnas hate when the light in the hood is on. do they all go nutz when you put the light on? Is there any solution to this problem, are there lower voltage lights? I am just worried they they well hurt themselves cuz they swim around like they are possessed when you 1st turn it on.

Buy the way, i just bought aanother Red Bellied pirahna yesterday, he is less the a 1/4" long and still havnt named him.. any suggestions, lol

Thanks again guys..
Peace

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fishman2
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Posts: 53
From:
Registered: Dec 2002

posted 02-13-2003 07:10 PM     Click Here to See the Profile for fishman2   Click Here to Email fishman2     Edit/Delete Message
You know? I have no idea how that got started that they don't like bright lights. I use very bright lights in my aquariums cause I use live plants. They do fine and it doesn't bother them at all. I think they are just accustomed in pet stores being in low light and take awhile for them to readjust in your aquarium. I keep traffic in front of them to a minimum cause outside disturbances bother them more than light.

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Hooben
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Posts: 96
From:El Paso, Texas
Registered: Oct 2002

posted 02-13-2003 09:19 PM     Click Here to See the Profile for Hooben     Edit/Delete Message
Fishman 2 is right. You know, I think that a dark room followed by the sudden turning on of hood lights is enough to shock the heck out of any fish. I use timers on all six of my tanks and adjust them so they turn on only when the sun is out and the room is not so dark. Likewise the lights are only turned off when there are other lights on inside the room as to not shock them with sudden darkness. Using a timer also keeps me away from the tank when the lights are coming on which could further scare the fish. Any quick moves near a tank always causes a splash or two in the water. Keep your tanks away from high traffic areas which could also make them more jumpy! My fish know that any time I approach is feeding time and they all come towards me without fear or hesitation.

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Kolbenschlag396
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Posts: 5
From:Howell, NJ, USA
Registered: Jan 2003

posted 02-14-2003 04:03 PM     Click Here to See the Profile for Kolbenschlag396   Click Here to Email Kolbenschlag396     Edit/Delete Message
My 3 5 inch Rbp's don't mind much anymore... what I did was leave it on all the time for a few days, feed them with it on, etc. Just to get them used to it. If you keep it off most of the time, they sometimes will get scared when it comes on. Other than that, make sure to give them plenty of places to hide, like in plants or behind rocks, this will make them feel safer. Good luck

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madmark
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From:ireland
Registered: Feb 2003

posted 02-16-2003 05:58 AM     Click Here to See the Profile for madmark   Click Here to Email madmark     Edit/Delete Message
I had that problem and two of my babys died since then i have floating plants which block out a lot of light.

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doweroo
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Posts: 5
From:
Registered: Feb 2003

posted 02-20-2003 01:16 PM     Click Here to See the Profile for doweroo   Click Here to Email doweroo     Edit/Delete Message
The reason they don’t like light is because their eyes don’t dilate. Humans and most other animal’s eyes can respond to light because their pupils can get larger and smaller for the amount of light, but piranhas eyes cannot do the same. If at all possible don’t apply direct bright light.

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EXPression[S]
Member

Posts: 18
From:London
Registered: Jan 2003

posted 02-21-2003 05:45 AM     Click Here to See the Profile for EXPression[S]   Click Here to Email EXPression[S]     Edit/Delete Message
I had a similar problem with my P's....so I changed the light to a MARINE type glow...kinda like a blue effect.

The P's do get used to it....so its a matter of time...however like the other guys said, dont shock them by switching the light on in a dark room....turn them on before it goes dark....

As for names; my P's were named by my boy....

1> Julius Ceaser.....cuz he's a brute!!
2> Jader: Super fast fish....
3> Zeus: Proper War horse..
4> Mr Tired: cuz he's got a lazy eye.....

EXP

>. Maximum props to the fishman2....saved my P's many atime with the helpful advice....

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fishman2
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Posts: 53
From:
Registered: Dec 2002

posted 02-22-2003 01:12 PM     Click Here to See the Profile for fishman2   Click Here to Email fishman2     Edit/Delete Message
"The reason they don’t like light is because their eyes don’t dilate. "

BS! if that were true then all fishes would be blinded by indirect sunlight.

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brian
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Posts: 5
From:albion,in,usa
Registered: Feb 2003

posted 02-24-2003 01:41 AM     Click Here to See the Profile for brian   Click Here to Email brian     Edit/Delete Message
hello it is good to use a low wyttage bulbs in the aquarium hood because the pirahas eyes don't dilate and when the light comes on the light hurts there eyes and it is a good idea to keep them is a busy area of the hause that will help to get them from getting skidish to well later

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fishman2
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Posts: 53
From:
Registered: Dec 2002

posted 02-24-2003 10:37 AM     Click Here to See the Profile for fishman2   Click Here to Email fishman2     Edit/Delete Message
"hello it is good to use a low wyttage bulbs in the aquarium hood because the pirahas eyes don't dilate and when the light comes on the light hurts there eyes"

Don't go away Brian, I'd like to know where you are getting this info from? Is it from some piranha book? This info is older than the dinosaurs and piranhas have excellent eyesight. As I said above, if bright light bothers them then sunlight would be burning their eye balls. Maybe you don't know but fish are in water and water breaks up light beams.

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fishman2
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Posts: 53
From:
Registered: Dec 2002

posted 02-25-2003 02:36 AM     Click Here to See the Profile for fishman2   Click Here to Email fishman2     Edit/Delete Message
On second thought since reading your other posts, you must be getting this stuff from SuperNate? His stuff is copied from other websites and piranha message boards, like OPEFE, Predatory Fish and Piranha Fury. He don't credit nobody but his ownself like he is some scientist. He's not, and is 22 year old wannabee piranha expert. I wouldn't recommend anyone to visit that web site cause all you are going to do is get confused and if you do make into real piranha message boards they will laugh at you if you tell them you get your info from Nate. Anyway, good luck with reading his information.

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ZeroVisibilite
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Posts: 1
From:
Registered: Feb 2003

posted 02-28-2003 07:39 PM     Click Here to See the Profile for ZeroVisibilite   Click Here to Email ZeroVisibilite     Edit/Delete Message
I have a question that may or may not pertain to this. But I was thinking of putting a Blacklight on my tank so I can see the fish but the aren't affected by the light source. How will this affect my Piranha? Thanx
ZeroVisibilite

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kc5gvn
Member

Posts: 251
From:
Registered: Jan 2003

posted 03-01-2003 05:58 AM     Click Here to See the Profile for kc5gvn     Edit/Delete Message
A blacklight is UV. It's good for killing
parasites. It's also good for destroying the
optic nerve of any living organism. Hope this
answers your question.

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FishKid
Member

Posts: 34
From:Hanover Park, I,l United state
Registered: Mar 2003

posted 03-24-2003 09:42 PM     Click Here to See the Profile for FishKid   Click Here to Email FishKid     Edit/Delete Message
Well I know this for a fact that sudden movements scare piranhas i guess that maybe when the light flashes on it ay scare them that is my theory

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doweroo
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Posts: 5
From:
Registered: Feb 2003

posted 03-27-2003 04:26 PM     Click Here to See the Profile for doweroo   Click Here to Email doweroo     Edit/Delete Message
"BS! If that were true then all fishes would be blinded by indirect sunlight."

BS to that, I looked into this with the help of an Animal Ecology Grad Student at Iowa State and we found out that Fish's eyes do not dilate. They use distance and water depth to regulate light intensity. When light is too bright, the fish's eye receptors become overloaded and it moves under shade or to deeper water to control the light intensity. Also, many credible sources back this information up on the internet and prove that fishes eyes DONT dilate! Fisherman2 I would like to know where your getting your information from???

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