Filter Foam - 3pack small Filter Foam sheets increases water clarity and has

increases water clarity and has beneficial strains of denitrifying bacteria bio-fixed

Kusuri Eco Pure is a biological product that degrades organic sludge

Robust and weather resistant

Also Filtoclear 16000

crystal clear

Filter Foam - 3pack small Filter Foam sheets increases water clarity and hasA pack of 3 high quality, dimpled filtration mats suitable for box filters. Size: 17" x 11" Supplied in 3 grades coarse (black), medium (blue) and fine (green). The filters should be cut to size and placed in the filter so that the water runs through the black foam first, then the blue and finally the green. Filter foams should be replaced when the old foam has become lazy. ie. it doesn't spring open when folded over.