Side-ways swimming black tetras

Durbkat

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I have 2 long finned black tetras in a 20 gallon tank and yesterday I added one of my regular black tetras from my 10 gallon tank. And this morning two of the three tetras in the tank are tilting alittle bit as they swim. What is this? And should I be worried?
 
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Durbkat

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There is no fin nipping going on and the last time I had the water checked it was perfect but before it was good water the nirites were really high. But I got that under control beforeI added any fish to it. The 3 tetras are the only ones in the tank. I just called the people at the lps and they said that the nirites could have gone back up and they can't get enough oxygen. Do you think this is true and is there something I can do to help them get enough oxygen in their tank? Also they are swimming and playing together fine they just tilt to their side at times as they swim. And the biggest long finned black tetra in their sometimes goes to the top and tilts to his side.
 

Jason

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I think ive seen some of my fish swim a bit tilted from time to time but they seemed fine and still are, so I don't know
 

Gunnie

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If you want to get more oxygen into your tank, get an airstone hooked up to a good air pump.  The bubble incorporate oxygen into the water whey they reach the top of the water causing surface movement.  Try and get an airstone that puts out big bubbles and not the little tiny ones.  The bigger bubble cause more surface movement.


P.S. What is the temp. of the tank? The warmer it is, the less oxygen is in the water.
 

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