Is there a specific part/area of the canister filter thats serving as nitrates repositories? I'll be cleaning my filters this weekend and will be replacing some media with Chemi Pure Elite and Im also thinking of getting rid of the white filter polishing pads. Will removing those white pads help or are there any other mods I can do to prevent or reduce nitrates build up in my filters. I still cant build a sump/ refugium so I have to survive using my canisters for the mean. Thanks for your replies in advance.