Im looking for a strong but quite air pump for a fludized k1 bed

[M3AN ONE]

Im looking for a strong but quite air pump for a fludized k1 bed any recommendations

 

[Kfactor]

I have the Eheim 200 for my k1 and like it but I think the 400 would have been better lol

 

[JK47]

Alita all day long.. they move a ton of air and I have to put my hand on then to tell they are on. What size bed are you trying to fluidize?