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Rated 3.2 out of 5 by 66 reviewers.
Rated 1 out of 5 by this product is awful worst filter ever.bought two and both horribly loud.never get this product because you will be very disappointed with it. February 1, 2015
Rated 2 out of 5 by i think they are junk This will make my third one in a single month.. They have made awful sounds and slow stop pumping water and eventually quit January 22, 2015
Rated 5 out of 5 by Description of Penguin 350 Filter I just received my Penguin 350 and hooked it up, and it runs great. It is quiet, which is amazing considering the large rate of water that flows through this filter. I wanted to let everyone know a little bit about this pump, since I couldn't find out too many details before I bought it. First of all, there are two filtration chambers, one on the left and one on the right. Each filter element consists of two squares of fibrous plastic material with what feels like activated carbon in between. They tell you to rinse them before installation, but very little dirt washes out when you do this.They recommend changing them every 2 weeks. Next, there is a single intake, which is a long tube that enters the impeller inlet in the center of the unit. The unit is self-priming: you just pour water into the filter box and turn it on; the impeller draws the air out of the inlet tube and starts the siphon automatically. From the center of the unit, the impeller pumps water into the left and right chambers, where it passes through a filter element and then spills under a "bio-wheel." Each bio-wheel is an inert, stiff plastic, corrugated cylinder, which forms a substrate for the growth of beneficial bacteria for removing certain metabolic by-products. The wheels spin fast and silently. The directions say that if too much bio-mass builds up, to rinse the excess off in chlorine-free water, but that they should never need to be replaced. After passing under/past a bio-wheel, the water descends down a chute on the inside of your aquarium. At the bottom of each chute, the water is deflected so that it mostly skims across the surface of the aquarium, away from the filter. This way, even though there is a strong flow, it doesn't produce a powerful current that the fish need to fight. The inlet tube also includes a mid-level intake, which is a set of holes a few inches below the top of the water that can be uncovered with a valve, to allow some of the water to enter from an upper level. If the valve is closed, all of the water is drawn into the filter from the bottom of the tube, which has a large strainer. Hope this helps! (And, yes, I am an engineer -- and proud of it!) January 7, 2015
Rated 4 out of 5 by I like this product. Good filter, long lasting, easy to clean, cleans the water very efficiently. January 7, 2015
Rated 1 out of 5 by Penguin 350 My only complaint with this filter system is the grinding noise from the impeller. I've taken the thing apart, rinsed, flushed etc. and it still makes the noise. The only way to get it to stop is by pulling the filter tube housing up some - this in turn slows down the filter flow going back into the tank. I'm very frustrated. January 5, 2015
Rated 5 out of 5 by Best hang on the back filters on the market! I have two Penguin 100 filters for a year and they are great! The water is always clear and I always get comments on how clear my water is from other aquarists. The only issue is, since one of these tanks is in my bedroom, if the water drops too low, there is a huge splashing noise. To combat this noise, weekly water changes keep my tank quiet. January 1, 2015
Rated 2 out of 5 by Quality with this product is inconsistant I'm currently very frustrated with my Penguin BIO-Wheel filter. I purchased a new 25 gallon tank about a month and a half ago and the Bio-Wheel 150 was included with the tank. Initially I was extremely impressed with this filter--the noise level was almost entirely silent, the option for two filter cartridges is very helpful for my goldfish, and the Bio-Wheel itself is great to have. Unfortunately, within 2 weeks of installing the filter it became quite noisy and began to sputter intermittently. I've tried everything I can think of--my water level is as high as it can be and has stayed that way since I first filled my tank. I thought maybe the aquarium sand in my tank had clogged the motor somehow, so I disassembled the machine very gently, rinsed everything off and re-installed it with no luck re-gaining my quiet filter. Today the filter is not even functioning at all. I don't know if I dislodged something important when I was cleaning it, or if my specific filter happens to be faulty, or what. But I'm so sad that something which ought to have lasted me years with the proper treatment has become dysfunctional after such a painfully short amount of time. Now I have to decide whether to trust this company and product again and hope I actually receive the quality that I'm paying for. December 12, 2014
Rated 2 out of 5 by Very noisy filters I purchased the Penguin 350 and 200 filters for my 60 gallon aquarium. Both of these filters are ridiculously loud, at night I can hear them from my bedroom, which is very annoying. I have replaced the impellers on both of the filters to see if that would solve the problem, but it did not. These are expensive filters and they are not worth the money, the much cheaper Top Fin filters that I have on my other aquarium are much much quieter. Also, the filters are not very compatible with the Marineand aquarium that I bought. The filter housing covering the Bio Wheels is jammed up against the light housing which has to be resolved by lifting the light housing off of its mount just to turn it off or on. December 8, 2014
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