hello everybody im about to get my external canister soon which is the cascade 1200. I want to know if i can add my own filter media in those tray that are provided within the canister? If so what would be good to fill up those tray? i know this kind of question is perpetually ask on the forum but i just really want to know if it'll work for my canister, if i put in a different media besides the one thats specificaly made for the canister. Also i want to know if its recomended. i really dont want to use to the filter floss and sponge that is design for the canister because i heard they arnt as durrable as house hold products..