guppies ramming wall / rocks

scubamazing.com

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Feb 27, 2006
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Hi All,

I learned something late Saturday Night. I wanted to feed my guppies, but got in later than usual. Normally when the room the tank in is dark, I turn the room-light on for about 15 minutes before I turn on the tank-lights. This night, I turned the tank lights on immediately.

I looked in on them a few moments later and noticed some guppies like on the gravel showing distressing signs (breathing heavily, swimming but dragging along the rocks). And the others seemed to be in a drunken state where they kept ramming and hitting the glass wall of the tank and the rocks at extremely fast seeds.

Initially I thought something must be wrong with my water. So I got on the internet looking but couldn't find anything. After about 10 minutes of frantic searching, I looked in again and noticed everyone was swimming fine.

Turns out it shocks the guppy a lot and messes with their mind somehow to go from deep black to bright light so quickly.

Anway, I wanted to get this up here, I couldn't find anything about it in my time a need, so hopefully this will help others if they notice their fish acting similarly. It is scary to watch your fish at a dead run hitting the ground and the glass.... over & over.
 
Well this is pretty basic stuff and it would apply to anything living with eyes. Heck how would you react if someone from pitch black shined a flashlight into your eyes. Tell me that wouldtn scare you ;) I mean fish dont have eye lids to wake up gradually when the lights come on.

For my setup, I have two sets of lights. One thats not bright at all. (very dim actually) and I have those come on at 8am and at 12 noon I have the bright ones come on....then at 7pm, I have the bright ones turn off and then the dim ones stay on until about 9pm.
 
That's a pretty good idea for lighting. It makes total sense that my fish would go insane because of the light for sure!. What are you doing to control the lighting? Some basic plug timers from the hardware store? or something more high-tech?
 
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