Review on Boxtech Hang On Filter Aquarium Power Waterfall Suspension Oxygen Pump - Submersible Activated Carbon Biochemical Fish Tank Filtration Water System - Wall Mounted by Tonya Greene

Well, for its size it lets through a lot of water and is great for a small (2-5 gallon) aquarium. But overall a three or four star product that gets two stars after pouring water. stuffed my whole dresser again today after about 20 days of great work. Just long enough and cheap enough, not worth the hassle of sending it back. Initially, my only two issues were that it was too loud (hum). And the way it's designed, you'll have to get creative to use anything other than a tiny replacement filter, which only sells for $2-$4 a piece for this design -- and only lasts 20-30 days. This adds $. It was too loud for my home office as it was very distracting but was moved to my kids room aquarium as they don't mind white noise. What happens is that the replaceable filter element becomes clogged and water cannot pass through and stagnates. Most overhanging rear filters are designed so that the back is significantly higher than the front, so water is always flowing into the tank no matter what. Not these guys. Flows straight through the back throughout the house. Mostly just disappointed that it's actually more garbage in a landfill.