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I Have No Fish but I Have Japanese Girls On My Ava
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18,487 Posts
Im not Frank, but I would imagine its a combo between them being more at ease with the lights off and basic predatory shoaling behavior.
 

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5 TIME CHAMPS
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19,142 Posts
once my lights go off in my tank my p's go mad...they swim up and down and all around..i hear them as they crash into the sides of the tank or they rush up for air adn knock on the light..i think they just feel more comfartable and secure without light..
 

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Registered
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1,232 Posts
Mine do the same thing as yours Mad now that they're in the 180...I think he may have to do with them having more space to themselves since you downsized and since I upsized my tank. Yours(as far as I saw) and mine always were huddled together but I think they felt a little cramped up...and now they have more room they stay together but take advantage of that room. Not sure about the time frame part of your question though, sorry.
 

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Got Rice?!?
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2,648 Posts
Same here, spilos are no different. They cruise the front of the tank back and forth, up and down. I can see thier shimmering little bodies from the light of my computer right now going back and forth. I just figure that it was natural since all the lights were off around the tank, and that P's feel more comfortable in the dark.

~Dj
 

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Death is fair to everyone.
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5,310 Posts
I mine do this also. It could be that they are more comfortable. And releasing pent up energy.
 

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Captain Britannia
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all of my reds have done this they line up and swim from one side of the tank to the other .i have my powerhead pointing toward the back of the tank and they take turns swimming into the current .
i also think it is due to having more room to roam and show this type of behavior
dixon
 

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35 Posts
mine act the same way. whenever theres little activity in the room (i.e. me walking around less, not watching them) they will start darting off from side to side.
 

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Go Bucks!
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3,164 Posts
Yep mine do the same when the lights go off at 8 PM. They also seem to have a internal clock and can tell when it's just about time for the lights to shut off.
 
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