DIY Canister.. Now what to fill it with?

I used a 1200 Maxijet powerhead connected to the out-take.
I made a 2 foot long canister out of 4" PVC. The canister lays flat (horizontal).

I have two 'media socks' created from scouring pads that are 9" tall.
I also have Three 2" Aquaclear coarse sponges cut to size.

I plan to fill it as follows:
=Intake-------[Sponge-Sock-Sponge-Sock-Sponge]--------PowerheadOuttake=
That should take up the 2 feet.

Question is, what do I fill the 'socks' with?
Would I fill one with ammo chips and carbon and the other with bio media, whats your opinions? What stacking order should i use these, keeping in mind the canister lays horizontal.

The filter is for a 30gal rubbermaid feeder tank holding 200-300 convicts, all less than 1cm (so far)

I can include pictures if they will help.

My bad. I noticed it turned into a filtration question. and I can't delete my own threads?

My only experience with filters are the emperor400's i have. I figured i'd copy the setup but it doesn't seem like the way to go.

so
=intake-----[sponge-floss.in.sock-sponge-bio.in.sock-sponge]-----outake=
is the way to go?

I know nothing of the chemical you speak of.

Heres some pics.

The threaded end connects to the powerhead which you can see is already placed in the tank. I added the plywood bowing support today as well. You can also see the female guarding her easter eggs, lol.
The socks are just 2 scotch-brite scouring pads sewn with a bottom. the sponge is 2" thick.

I got bored so here is a photoshop representation.

This is how you're saying I should filter this 30gal feeder?

due to lack of advice I think that's the route i'm going to go.
Although I hear a lot of people saying elsewhere to just use biomedia...

who knows, i might do a half carbon half polyfill sock then a biomedia sock.
Just gonna go to the LFS and see what they have lying around.

I filled the bottom sock with poly-fill.
I filled the top sock with 5 bags of aquaclear110 biomedia.
Sponges in between each layer.
(Just as my illustration shows.)

I'll definatley let you all know how she runs!


Much respect to rezin and scratchanut. I had an idea for messin with my powerhead one day and luckily your threads were on the first two pages, without that i probably wouldn't have tried. my fish thank you.