I think you're right about the bio industry. I'm close to farm country so that makes sense.
The filter it came with is a model for gas, but I could give it a try on 5 gallons and see what comes out. I've had a hard time locating replacement filters. The hop rocket is a good idea too. It...
I found a filter some time back in an equipment auction that I thought would be usable in my brewing process. After getting it home I'm not entirely sure of the use or application. I wanted to see if anyone was knowledgeable about this type of filter.
I got it for cheep so no real loss...