if you havent started this yet I highly recommend the can filter 2600..

http://www.wormsway.com/detail.asp?sku=CF0062

MSRP is $59.99 and you can find it for less! It is way more sturdy than that design posted above.. I own one and love it.. check the ratings on it too.. super good.. It has 12lb of activated carbon.. compaired to...

"Three 28oz jars" (5.25lb)

my rec... dont waste your time and money! order the original can filter.. you will NOT be disappointed!