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Old 01-10-2013, 10:00 PM   #1 
Join Date: Nov 2012
My betta doesn't like light?

My fish has been acting depressed the past few days. Seems sort of "saggy" in the water, less active than normal, tends to go sleep in his tree more than I think he should.

I thought he might be sick but his appetite is ok. He is in a split tank and the other fish is perfectly well.

Yesterday I placed a piece of dark paper over the back of the tank. The back of the tank is nearby a kitchen counter light. The paper blocked the light. I came down this morning and saw that he has right away made a bubble nest (he never made them before) and seems more alert, active and happy. He's been good all day.

Is this a reaction to the light? Can a fish dislike light?
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Old 01-10-2013, 10:05 PM   #2 
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Join Date: Jul 2012
Location: Ontario, CA
Is that the only light he gets? It could've been too bright. It could be he was seeing his reflection & it stressed him.
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Old 01-10-2013, 10:09 PM   #3 
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Join Date: Dec 2012
Location: Goleta, California
The light might be a little too bright. When I first changed to a brighter bulb, my bulb stayed at the bottom of the tank and was motionless, but when I turned it off, he was active. He got used to it the next day.

Do you have a lot of covering for him to block out some of the light? Like a floating plant or a plant with large leaves?
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Old 01-10-2013, 10:47 PM   #4 
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Join Date: Jan 2013
Location: Conneaut, Ohio
After reading this post I think that maybe that's what my female betta's problem was. I had her in a half gallon bowl for a little while (just until her tank was ready) and now that I've moved my male into the ten gallon I was able to switch her into the 1.5 gallon he was in until her 5g is settled. Well I noticed that she was kinda acting sluggish and shy so I turned the light off of her (since she was extremely active in the bowl and that didn't have a light) and almost instantly she was thrilled
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