I’m looking into building a flow box. I’ve been looking into hepa filters. I’ve found one that’s 21”x41”x2.5”. Got a efficiency of 99.99% at .3 micron and has a .45wg. Will this work for me? Also what type of blower would I need. I believe it’s the Dayton 1tdu2. I tried sab to only get contam in my agar dishes that I used spore syringes on. Any help be great thanks!!