I,ve got 2 aqua clear AVC800 cannister filters running on a 100 gallon tank. Each one pumps out 800 litres per how. I have 3 medias in there. The first one has biostrate. The second has Bio Balls and the third has Noodles. Can someone please explain to me what each media does and do i need to replace each media and if i have to replace them how often should they be replaced.
Thanks.
Thanks.