hi, i have just had my aqua pro1 SP filter delivered. it has two trays, one had just floss in it and the other just a sponge. i have put the sponge and floss into tray one as there is masses of room (floss on top!) and in the bottom tray i would like to have some ceramic media. however, it comes in a little bag with holes in it, do i take it out of the bag (i think i do but want to be sure). at the mo, its saoking in the sink and fizzing for some reason! but i just need some help.