cant even remember what thread they were talking about filters,so i put this on your to give you some attention hahaah,ya got about half way threw and have cleaned it so many times that i got to buy another,freaking prices are shit imo,so i recycle every thing i can and this went into a 5 gal bucket topped off with water and fish fert 5-1-1,morbloom 0-10-10 for 2 weeks to charge and in the totes it goes,most dont like char because it holds nutes,it supose too ,there issue isnt the char,there issue is they still want to force feed there plants and cant with the char because it hold nutes for years,i use the shit out of it,make it myself and in the garden it goes along with the ash every year around this time