09-03-2013, 12:13 PM
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Originally Posted by FishyFishy89
They aren't gasping all the time. Just randomly. And they hardly hover near the surface either. With the gouramis, I see most it after they chase one another. The angels are the most random with the gasping. I can't seem to pin point what may cause it for them. They all(including the gouramis) do their thing; grazing, swimming, chilling out, exploring, chasing....and if they happen to end up at the surface, they'll gasp at the surface for what appears to be about 3-4 breaths and then they continue on like nothing ever happened.
First sentence in your original post.."My fish are gasping at the surface" This is sentence that led me to suspect Too much CO2,not enough O2.
If this is the case,,it is normally seen at night after light's out when plant's quit taking in CO2 and when same plant's begin using up available O2 (oxygen).