This might be old news to some but I had to figure this out myself... I bought 1.5 gallons of Purigen but couldn't find a decently priced 100micron filter bag that big. Turns out a 100% polyester pillow case works great! I can't say for certain what it equates to in microns, but no purigen got through during the pre-rinse.
I also noted that the washing instructions warned about using bleach.. I have no idea what this concern is about. Since you're supposed to use a strong bleach solution for recharging I was initially concerned. So I cut off a piece I wasn't using and soaked it in bleach for a 2 weeks. It doesn't seem to deteriorate or discolor.. so I don't know what this bleach warning is all about.
Does someone know what the deal is with polyester and bleach?
So far its been a great cheap alternative for a large fine filter bag.
I also noted that the washing instructions warned about using bleach.. I have no idea what this concern is about. Since you're supposed to use a strong bleach solution for recharging I was initially concerned. So I cut off a piece I wasn't using and soaked it in bleach for a 2 weeks. It doesn't seem to deteriorate or discolor.. so I don't know what this bleach warning is all about.
Does someone know what the deal is with polyester and bleach?
So far its been a great cheap alternative for a large fine filter bag.