Angelfish coming to surface for air. - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 12 Old 04-02-2013, 10:22 AM
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Hello MoneyMitch:
I enjoyed your post …enough said ….. (I take it you know a reason for my considerations to be factual?)…. It gives one a good belly laugh.

It’s been fun.
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post #12 of 12 Old 04-04-2013, 03:53 PM
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Getting back to the original issue, Stoke88, I would take a very different approach. In my opinion, this has nothing to do with oxygen in the tank, or you would see all fish gasping at the surface. One fish doing this when the other fish are behaving normal [I assume from your data they are] is clearly a specific health issue with the one fish.

I have seen this, in a tank of 130+ fish, where one tetra will remain hanging at the surface. Sometimes it recovers, more often it dies within a few days. I've no idea what might cause this. I have one pencilfish in my 90g behaving like this as we speak; it is also off-colour, a bit washed out. Is or was the angelfish showing normal colouration, with clearly-defined patterning?

Increasing water movement, aeration, or the plain old water change will often help the lone fish. But from this we cannot jump to the (erroneous) conclusion that there is some sort of oxygen deficiency in the tank. This is very highly unlikely in any aquarium with sufficient and working filtration.

Keep an eye on the fish doing this and let us know what follows.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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