Shorty wrote,
I am debating whether I need to put any bio-ball type media in my
filter for the bacteria.
Do I need to build-up a bacteria colony in my filter for a planted tank
or will the plants take care of the ammonia, NO2 and NO3?

A heavily planted tank and a lite bio-load you might get away without a
bio-filter. But, you might have to do more water changes more often.
Keep in mind that ammonia and nitrites are not the only thing a filter
is needed for. You still have DOCs (dissolved organic compounds) and
solid particulate waste to deal with. A build-up of eather, your water
quality slowly deteriorates. I think my tanks are pleasant to look at
because they are heavily planted, but they are *fish* tanks.
As for as filter media goes - there is three things to look for; SSA
(Specific Surface Area), void space and cleanability. Gravel used for a
filter media has a surface area of about 100 to 200 sq. meters per
cubic meter, pood void space, and really hard to clean - making it (at
best) a poor filter media. Plastic has 250 to 300 SSA, ceramic 300 to
350 SSA, matting 350 to 400 SSA, and sponge foam 400 to 500 SSA, void
space just right, and really easy to clean. Why spend the $s on plastic
or ceramic bio-ball type filter media when a much better media is
cheaper (sponge foam)? .................. Frank