Hey everyone, how are you all doing. Quick question I have a Aqua clear 30 and I need to replace the carbon in the filter. I know some people dont use it, but its helping right now to clear my tank. Instead of buying the aqua clear replacement carbon pouches, could I use this? http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+4136+3599&pcatid=3599 It would be cheaper in the long run, but how would I go about measuring out the right amout. Thank you all, as always i appreciate your help.