Penn-Plax Cascade 200 Power Filter – Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups

After researching a number of different filters for my 20-gallon gourami tank, I decided to give this one a try. It is designed with function in mind, including an adequate system of bio-filtration and flow control. Flow control, though simple in design, is a nice feature to have that is sadly lacking on many HOB filters. This feature was important to me as gouramis are labyrinth fish who prefer slow-moving water, and I wanted the ability to adjust the flow, if necessary.One reason I hesitated to invest in this filter is that, although the filter itself is very reasonably priced, the replacement filter cartridges are somewhat expensive. Fortunately, the size of the intake tube is just right to use one of these pre-filters:  Pre-Filter Sponge 3 Pack for Fluval Edge Aquarium  This increases the biological filtration even more while filtering small particles before they ever enter the filter itself. I simply rinse the pre-filter in aquarium water ever two weeks or so and replace the filter cartridge once a month, since activated carbon expires monthly. Rinsing the pre-filter is an easy step, since this has an extendable intake tube, making it easy to detach the endpiece from the filter itself without having to actually pull the sponge off the intake every time. The filter even continues to run while I do this, as long as the end of the intake is submersed. As an added bonus, my flower shrimp loves to eat the particles of food that collect on the sponge, and as a filter feeder, she enjoys the luxury of hanging on the intake to make use of the flow without the danger of being harmed by the filter intake. Meanwhile, between some tinkering with the flow control and the addition of the sponge, the flow itself is weak enough to not upset my male/female pair of gouramis, who are able to blow bubble nests and engage in spawning behavior. Even though this is only a 20-gallon tank, the flower shrimp, clown pleco and mystery snails have their own space, and the gouramis have theirs. Having a sponge pre-filter and flow control also benefits the live plants in my tank, especially the java fern, which proliferates easily and abundantly, but often can be damaged by filter intakes when the young ferns float about the tank before finding a piece of driftwood or other material where they can grow.In terms of reliability, I have run this filter steadily for four months as of the writing of this review, and, used in conjunction with some additional sponge filters, this has proven itself to be reliable. It is self-priming and consistently restarts automatically following a power outage. It even runs steadily during a partial water change, and the 'Bio-Falls' system seems to provide additional aeration for the water, which is important not only for providing oxygen for my water-breathing creatures, but helps remove toxic substances, which benefits all of the creatures in my tank, including the air-breathing gouramis.To conclude, I will provide a brief list of pros and cons:PROS:1. It is inexpensive2. It is effective in terms of mechanical, chemical, and biological filtration3. It is reliable and self-priming4. It fits the inexpensive Fluval sponge pre-filters5. It has flow controlCONS:1. Replacement cartridges are not easily found in stores2. Replacement cartridges are expensive (but this can be easily addressed by using an inexpensive sponge pre-filter, extending the cartridge life to at least a full month)

I have many different type of filtration.... sump, hang on the bag, sponge.... this filter (I have 2 sizes), just great, high flow and silence. Plus = re-start, most of the time, if the pump shut-down. Now, I advice few modification. From the in-take add a foam/sponge, inside the filter tank, do not used the provided equipment, use foam/sponge and add ceramic rings (or equivalent). Nothing will compete with this hang-on the back filter. The aqua clear is nice too (I have QTY 3), same principle but will not re-start in case the pump stop. Please remember = for best result, oversize your filter. If you have a 20 gallons, use the next size hang-on the back (30 to 40 gallons capacity). This is true for all filters. You will never be sorry for this advice. Why = Because, you can stock your tank as much as you want, add any plants, and never be worry about it. Also, do not neglect your filter, clean it (just be careful with your media not to kill your bacteria). Enjoy.

First one quit working after a day. The other two both came with broken parts, the thing that keeps it level or away from the tank. Both purchased at different times, both prime, not sure the vendors. Quick fix, just added a suction cup next to the part and the loop for airhose does the same thing, the other I put a little pad. Needed filter didn't want to wait.They are very quiet, have it right next to my bed and don't even hear water falling (water level high). Using it for a 40 gallon tank. Have to touch it to see if it's running. Filter runs great, can see the suction. Put squeaker (leak detector) under it, last filter leaked. It's very easy to set up, seems strong, quiet. I like it. The only downside is that it does not cause enough (hardly any) surface movement. I have two on a 55g, one on each end and added a bubble wall in the middle, just to have some surface movement. Second one is on my 20 gallon long, with a sponge filter. There is a humming/vibration noise to this one, only noticeable because it's also next to my bed. So far not too bad.Cheaply built, most problems can be fixed by taking it apart and starting over. If you have the money, go for an Aquaclear filter. If not, this seems to be a decent filter. I'm sure if you keep sending them back you should be able to find one without broken components.Get a feeding station if you have floating plants, blocks output perfectly.

Great pump. Cleans water very well, and quick. Starting it up can be a pain to get it to cycle but it adventualy does.

Edit: tossed it. The warranty charges you $15+ for shipping and processing... Considering I paid under $20, not worth the risk of it blowing again. Bought a Fluval, much better.I was enjoying this filter, it was nice and quiet and seemed to have decent water circulation considering I was using it in a tall Hex tank. However, this morning I woke up to find that the motor burned out already! All of my fish were gasping. Luckily I have a side tank I was starting to set up so in the meantime I pulled the small filter over... Will see how good this 3 year warranty actually is but now I have to go buy a new filter today anyways because I can't go without proper filtration while waiting for the new parts to arrive.

Filter seems high quality and effective, however I am disappointed because the description is misleading. I originally purchased this Cascade 200 for a 55 gallon as a second filter since it's made for up to 50 gallon tanks. The problem is the filter is rather small and does not fit properly on my aquarium!.

Un producto completo, no usé el carbón activado y lo sustitui por matrix y esponjas; caben lo suficiente para tener microorganismos benéficos. El material se siente resistente. Lo volvería a comprar

Good to 25 Galen fish tank

Self priming, quiet, good filter.

Muy bueno funciona bien y es silencioso buena calidad y precio.

Very quiet for a hob filterFirst one arrived broken