Started this hobby about a week ago with a 5 gallon betta tank and have then gone and started a 29 gallon community tank. I ordered 1 large active Angels plus filter a couple days ago for the 29 and received it today and within 3 hours I went from .25 ammonia, 2.0 nitrite, 0 nitrate to 0 amonia, 0 nitrite, and 5 nitrate. I currently have 8 neon tetras and 3 albino cory cats in there and they all look great and are acting and eating fine. When I first started my research on cycling a tank and saw it could take 8 weeks I was shocked but you can skip that whole process with these things it looks like. Also the owner answered every question I had right away. Would totally recommend to any newbie like myself that might run into problems cycling your first tank.