10-09-2011, 12:12 PM
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Originally Posted by patadams66
exactly why would they be respirating fast? not to get off track, just something i have never looked for.
Stream fish are designed for a certain water flow. In my 115g tank, which is where this occurred, I have a number of different cory species; some occur in moderate-flow streams, some in quieter streams. They take up residence in the tank accordingly, those from faster streams "hang out" at the end with the filter flow strongest, and the others opposite. The rate of respiration is geared accordingly, by which I mean that for either species "normal" respiration will occur when they are in the flow they expect.
This is probably tied to the oxygen, as Gwen mentioned. But as in such a heavily planted tank [and back then, it was much more heavily planted than it is now] during the day there would be no shortage of oxygen. So the water flow must also enter into the equation.
This is all part of my frequent suggestion to regularly spend time just sitting quietly in front of the aquarium, for an hour or two, and observe how different fish behave and interact. You soon learn to recognize "normal" so when something does occur, it is much easier to spot.