i have 2 externals one filter has 3 trays and the other has 2 and i want to keep 1 tray with sponge and floss on each so 2 bottom trays left to fill on 1 filter and the bottom tray to fill on another.
what do you recommend i have been told this stuff is good for the bottom tray on each.
http://www.pondpetsusa.com/filter_media/kaldnes.html
what do you recommend i have been told this stuff is good for the bottom tray on each.
http://www.pondpetsusa.com/filter_media/kaldnes.html