So I just picked up a eheim Eccofrom a buddy and am looking into what media to use. Oroginally eheim has there pro bio substrate in all three trays but I feel like there's gotta be something better to use out there. I know I'm gonna use ceramic disk in one tray, eheim pro bio substrate in one and then I wanna do something different in the other one. Bio balls or something maybe? What do you guys like to use In your canisters?