i have an aqueon 55 hob on a 36 gallon bowfront and would like to get some of that bonded blue filter padding and some media other than the stock carbon. i hear that carbon doesnt do much other than for using after medicating a tank. the filter has space for 2 filter pads so im wondering what would be best to put in those spots? should i get 2 differant types of media or just 1 and what type do you recommend? thanks for the help!!!