We have a filter setup something like this bought at HD http://www.waterfilters.net/Watts-W10FF ... using.html
it's clear but it's a GE brand. It works good depending on your needs. We tried using this cheaper filter http://www.homedepot.com/webapp/wcs/sto ... =100041014
but found that stuff got past it and just clogged our water filter in the refrigerator. So we went with the higher cost one http://www.homedepot.com/webapp/wcs/sto ... 260+502379
which is suppose to be good for 3 months or 5k gallons and we at most can only get a month an a half from it before it drops our water pressure down. I found these http://www.waterfilters.net/Pentek-Cull ... lters.html
for less money but they still only last a month and a half.
My case of those filters are almost gone so I was looking at maybe going with this type of set up http://www.waterfilters.net/Pentek-BBFS ... ystem.html
since it's larger and I could have the cheaper filter before the 20 micro(GAC-20BB) one and should be able to get at least 3 months out of it because it's rated for 25k gallons. I figure using 2 of the first ones for 25.49 a piece @ $50+ every three months that it would be cheaper using the 20-BB ones once every three months @ say $47.99 or less if more then two are bought at a time. Less work more money saved seems like the way to go.
Note the three filter setup for 1 inch pipe is also available under the instructions section for 3/4 pipe.