ten thousand master's theses have been written on the matter between bubblers and pumps for oxygenation and waste gas removal.
powerheads specifically lose against even weaker bubbler setups in the race to eject co2 and uptake oxygen, tables will show. they manage ten million gallon freshwater lake fish kill events with giant bubblers, not giant pumps.
that being said I'm not sure its the issue here, its hard to discern issues regarding new fish acclimation/transfer and holding without patterns. If sixty people had issues, that would seem to be a pattern. ratings look good to me/need more info here.
powerheads specifically lose against even weaker bubbler setups in the race to eject co2 and uptake oxygen, tables will show. they manage ten million gallon freshwater lake fish kill events with giant bubblers, not giant pumps.
that being said I'm not sure its the issue here, its hard to discern issues regarding new fish acclimation/transfer and holding without patterns. If sixty people had issues, that would seem to be a pattern. ratings look good to me/need more info here.