It isn't a good place for carbon. Carbon stops working after a few days when all the pores are clogged up with bacteria and stuff. Contrary to popular opinions, a mesh bag in a high flow area is by far the best. If you don't mind disconnecting it and cleaning it every few days it doesn't matter of course. If you are anything like me however ....cough... 
If you are not using filter socks an hob filter does the same job as a canister/sock while saving your pod population and is much easier to clean up (and near free too!). Hang a floss pad from it and put a lamp over that and you have a very well working ghetto algae scrubber too!
You look a little handier than I am though so you might not need ghetto solutions.
If you are not using filter socks an hob filter does the same job as a canister/sock while saving your pod population and is much easier to clean up (and near free too!). Hang a floss pad from it and put a lamp over that and you have a very well working ghetto algae scrubber too!
You look a little handier than I am though so you might not need ghetto solutions.