I need a powerful aerator

[captmicha]

I'm looking for a powerful aerator. Used is fine. I don't need line or stones.

I don't exactly know what watt I need... If you could explain it to me, that'd be great.

 

[cap1384]

what is it for?

 

[Mgamer20o0]

running sponge filters? big tank?

 

[captmicha]

For like 50 gallons. Not a marine one though.