Carbon, whether hanging in media bags, in a reactor, etc is
not enough on it's own to deal with issues of this magnitude. I would add add a second major point to this -
When dosing anything to the tank that is designed to 'remove' (kill / destroy, eradicate, etc) a pest that is present in large numbers:
1) Read up on what is going to happen - if anything - when those pests start to die / decompose, etc so you can have a halfway decent idea of the scope of what you are looking at and how online 'experts' have dealt with any issues that may have arisen;
2) Ask other local hobbyists for their opinion / experiences; and do not proceed until you have at least 2 or 3 different people's experiences working with the material. Their input is valuable because, unlike online reading, they are local and can tell you specifics as to whether or not local conditions are a factor you need to account for;
3) Plan ahead and have everything in place ahead of time to perform a massive (50% or greater) water change should things go awry. If you can't set up (don't have enough water containers / salt mix / mixing pumps, etc), or just don't want to set up (too much hassle / don't want to spend $$$ for salt / water containers / pumps, etc) for an emergency water change... Do NOT use the material.
Edited by BobC63 - February 21 2014 at 10:31am