There is only one filter that distillers need when they are bottling the whisky out the cask ! Ralfy shows that filter in video 841 Extras : https://www.youtube.com/watch?v=is2a_U8Zi7I
Ralfy reviews the oldest and most expensive whisky he has ever bought and reviewed on his Youtube channel : Old Perth 41yo Blended Malt @ 45.3% (Morrison Mackay) https://www.youtube.com/watch?v=omN37nyQx00