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Re: [compost_tea] cfm



Hi Dwayne

1 to 1.5 in a Bob's type system -  BUT be aware that you cannot depend on catalogue ratings.  Two pumps rated at .4 cfm one produced .232 cfm the other produced 1.111 both at 0 psi  back pressure.   Then consider the depth = back pressure.  Also consider the efficiency of your brew system, the recipe, the temperature.   CFM?  It depends!  But there are a few items to consider. Been there.  Done that.  Good luck.   Bob 

 shu chan <livfoods@yahoo.com> wrote:

Hello All,

Would someone tell me how much oxygen has to be moved to properly aerate a 50 gal CT brewer, how many cfm?

Thank you, Dwayne





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