Which is better for aeration: small internal power filter or air pump?

[sealife]

Could I replace air pump and air stone (air bubbles) for a small internal filter that also works as power head? I really dont need the extra filtration. Just a bonus really. Or does air stone work alot better in aeration and adding oxygen etc etc?

Thanks.

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[toddnbecka]

Air driven sponge filter alone is fine, main thing in any case is circulation throughout the tank. Nearly all the O2/CO2 exchange takes place at the surface of the water, so turning over the tank volume is important.

 

[sealife]

I was thinking of using an electrical internal filter (i already have another filter running, this is just extra filtration as a bonus) instead of using an air pump with air stone .

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