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Phil_Robo 03-17-2010 04:43 PM

Why do my fish hide when lights turned on?
Hi there

I have owned a Fluval Vicenza 180 aquarium for 10 days and each time I turn my lighting on, my tiger barbs, angel fish and silver dollar all go and hide away from the light...???

Its very dissappointing as I stare at what looks like an empty fish tank. My tank is second hand and the filter is mature, that is why I was able to transfer my fish across so quickly.

Any ideas why? Any solutions? Any Fluval Vicenza owners out there?

Thanks in advance


HN1 03-17-2010 05:08 PM

Is there any decor for cover? Plants?

I always hide under the covers when the light is suddenly turned on. ;)

Welcome to AA!

Phil_Robo 03-18-2010 06:02 AM

YEs - there are rocks and bog wood for them to hide under - thats why I cant see the little monsters unless I am a foot away from the tank and then can watch them all huddled for cover!

mfdrookie516 03-18-2010 09:38 AM

try turning on a lamp real close to the tank for 10-15 minutes before you turn the tank light on. in nature, the sun doesnt suddenly pop up and shine, it slowly comes out. If you dont replicate this, sometimes it can scare the fish and they hide from the shock

HN1 03-18-2010 10:34 AM

Also, it may seem counter-intuitive but the more cover that shy fish have, the more you will see them.

austinsdad 03-18-2010 10:46 AM

Do you have a timer for the light? I'm wondering if you standing there - this huge dark shadow looming, and turn the light on by hand can be scaring them too. Most use timers. Try that so that they stop associating the light being turned on with the huge monster standing outside of the tank.

mfdrookie516 03-18-2010 10:40 PM

you could also try feeding as soon as you turn the light on... if the light comes on in my 150g, my fish are begging for food... its just natural for the light to come on at a certain time and go off at a certain time in my planted tanks...

jessibell 03-18-2010 11:13 PM

yes mine do the same. The food drops within 30 seconds of the light being turned on. The newbies take a few days to put this together but they catch on. When I turn the light on they all rish to the top. If I forget to turn it on, they practically bang on the glass to get my attention. Sometimes I do startle them and they hide for a while, but they always come out. The feeding thing is kinda like Pavlov's dogs, they will catch on to the routine :)

Civicman86 03-25-2010 08:10 PM

Give it time. My fish come up to see me now. They always think they are getting fed when I come near the tank.

capj64 03-25-2010 11:11 PM

The first morning after I got my two clowns I flipped on their light at 4:30 am...Let's just say I'll never do THAT again :) They sleep in to at least 7:00.

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