So my filter is out of commission for a few days until I get the a new motor head cover (nozzle on Eheim broke off). I'm worried that the CO2 levels in my tank are higher than usual because of this (pressurized CO2 system). I think I'm seeing gasping in the fish that I never see (I think that's what it is...very quick breath, never seen it before). Could this be because of the broken filter? Or should I be looking at other causes?