Air filter

Hi everybody,ย 
Has somebody any recommendation about filtering air for harchery. the situation is as folowing: I have large blowers for my farm and would like to usee them in my hatchery, but the air intake is inside the farm, so I am afraid that I might contaminate my larvae.ย 

So I would like to put a filter for this section.

Thanks in advance and best regards,,

Eric

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