[Fishfirst]

I'm not saying aeration does not affect o2 levels, I'm saying o2 levels have absolutely nothing to do with co2 levels for instance, you can have a high co2 level (by % or by ppm) and a high o2 level (by % or by ppm) or low o2 and low co2, or high o2 and low co2, or low o2 and high co2... one does not kick the other one out, you can have a lot of both and it can still be deadly... as for where I got this information, it is basic principles of high concentrations and low concentrations, a particle could "care less" if a particle of a different molecular structure is in a concentration with it... it only "cares" how many particles are in concentration with it that is the same molecular structure.