just got done filtering half my stock. Holly shit you’re in for a long day, it sucks lol. The worst part isn’t even filtering - it’s drawing everything up into the syringe prior to filtering. I didn’t use a caulk gun as I was just using a 20ml syringe 1 vial at a time. It’s 1 little drip at a time after that, but wasn’t too bad doing it all by hand. I had 1 filter start leaking from the needle end. Thinking that my needle gauge was too small and there was too much pressure (Had a vent needle in as well). I wouldn’t go with anything smaller than a 21g next time.
Also just to update, I was able to draw up the contaminants that were floating around in the vial so they definitely can make their way up through a needle. The filter caught it all and holly shit was it dirty....