I normally use the 6 1/2 inch Isotropic milk filters. They are $3.95 a box of 100 if you buy 3 or more boxes. I only have enough filters for 2 more weeks so I need to get some more. I was wondering if you can use coffee filters to filter your milk? I can get a sack of 100 for $1.00 at Brookshires right now. I also thought about washing my isotropic milk filters in bleach water and reusing them, but DH said he doesn't think that is a good idea. Anybody have any ideas about economical way to filter your goats milk? Next spring I'll have 5 Alpines in milk so probably close to 5 gallons twice a day to filter.