Right carbon filter for fan

[Virandell]

Hi I have 141m3/h fan and I am planning to buy 350m3/h filter but I am abit worried it's might be to big but probably more effective ? And in the future I am planing to buy 3x3 tent currently I have 2x2
Second option I can buy 175 M3/h which would be ofc perfect

 

[TurboBucket]

Too large of a filter reduces it's effectiveness. It will only draw air through the portion of the carbon bed that is closest to the flange.