Ok I'm really angry here... I used to use five in one test strips (broke) but now I got a little money and invested in a master fresh test kit the tube variety. Ok I keep showing 40ppm on my nitrates with this kit strips I never read higher than 20ppm I have a 5month old aquarium so def not cycling not overstocked done at least 60cent change of water(vacumming) and always do a 40 percent water change (by vacuum) a week used nitraban about 2weeks ago claims on bottle last 6 months I'm stumped is it time for more filtration or what I'm pulling hair out over here maybe putting media in my in where I can fit in hob add my little 20g filter on for help???