Marineland Magnum Polishing Internal Filter, 97-gal

Worked great on my 170 gallon cattle feeder pond! I know it says up to 97 gallons, but hey it works. I hadn’t been very proactive and let it get cloudy. At first I had to clean the filters after 3 hours and slowly worked up to 8 hour runs. Now the water is very clear, and the koi are happily swimming around. So if you were a inattentive pond owner, with a little patience, this works great.

I love this filter! Used it after scraping my glass, doing a water change and blowing out my sand. This thing clears the water up in only a couple hours. I would not use this for main filtration because it clogs up fast, but it’s fantastic for clearing up a major issue in a couple hours or overnight.

I have been using this filter for about a month now. I have a turtle in a 90 gal aquarium. My aquarium is filled up about 30ish gallons and I have been looking for a filter to take on the bioload. I haven't cleaned the filter yet, but it is extremely powerful and very inexpensive for the power. I would highly recommend it. I didn't want a canister filter because I don't have the aquarium filled up all the way and I seem to break them or they stop working a couple of months within use (when the aquarium is filled up all the way). I needed a filter that could take on three times the amount of water in the tank and also something to keep the water constantly moving, to prevent debris from settling I have been using this filter for about a month now. I have a turtle in a 90 gal aquarium. My aquarium is filled up about 30ish gallons and I have been looking for a filter to take on the bioload. I haven't cleaned the filter yet, but it is extremely powerful and very inexpensive for the power. I would highly recommend it. I didn't want a canister filter because I don't have the aquarium filled up all the way and I seem to break them or they stop working a couple of months within use (when the aquarium is filled up all the way). I needed a filter that could take on three times the amount of water in the tank and also something to keep the water constantly moving, to prevent debris from settling. The filter isn't completely submerged. I turned it upside down and the input and output submerged in the water. You can also add media to the filter which I really liked. It also came with some media, but I need to purchase more. I purchased this filter just to see if it would work and it's worked longer than a lot of the other cheap filters. I am very pleased and pleasantly surprised. I would not recommend this to be in an enclosure with animals that aren't strong swimmers. But otherwise, great product. … more

I do believe this will work for me. I knocked one star off because it did not come with bio balls (or any kind of bio filter- I am using a sponge until I can get some bio balls) and because the flow is very powerful and cannot be adjusted. I have it in a 55 gallon tank and thought it would be good because over filtration is always better than under filtering. I aimed the flow at the side of the tank, and opened the second opening on the plastic out-flow piece to help reduce the turbulence in the tank. The guppies still get blown around a bit, but they keep coming back for more, so perhaps they are enjoying it? I just hope the babies don't get sucked in. Also, it's not very aesthetically pleasing I do believe this will work for me. I knocked one star off because it did not come with bio balls (or any kind of bio filter- I am using a sponge until I can get some bio balls) and because the flow is very powerful and cannot be adjusted. I have it in a 55 gallon tank and thought it would be good because over filtration is always better than under filtering. I aimed the flow at the side of the tank, and opened the second opening on the plastic out-flow piece to help reduce the turbulence in the tank. The guppies still get blown around a bit, but they keep coming back for more, so perhaps they are enjoying it? I just hope the babies don't get sucked in. Also, it's not very aesthetically pleasing. If it just didn't have that red stripe on it, being all one color would make it much easier to hide. I plan on building up plants around it, but I'm sure I will always see that bold red stripe. … more

I have to agree with a previous reviewer, STOP TUE HATE! This item worked better than I ever expected. Anyone that has issues with it are due to user error or never did research on owning aquatic animals. I bought this as a filtering aid for my 55 gallon tank on top of my external canister filter. Initially I had it set up in the filter mode but I have switched over to water polishing and I have never had cleaner water. Everyone needs to remember that you should always make sure to have Filters that can handle twice the gallons of tank you have. Meaning if you have a 20 gallon tank you need to make sure the filter can handle up to 40 gallons minimum. I recommend this as a water polisher or as I have to agree with a previous reviewer, STOP TUE HATE! This item worked better than I ever expected. Anyone that has issues with it are due to user error or never did research on owning aquatic animals. I bought this as a filtering aid for my 55 gallon tank on top of my external canister filter. Initially I had it set up in the filter mode but I have switched over to water polishing and I have never had cleaner water. Everyone needs to remember that you should always make sure to have Filters that can handle twice the gallons of tank you have. Meaning if you have a 20 gallon tank you need to make sure the filter can handle up to 40 gallons minimum. I recommend this as a water polisher or as a filter Only to pick up the slack of another filter absolutely amazing. … more

I bought this filter system, and, loved it so much, that I bought another. We have a 90+ gallon tank for our aquatic turtle, and, there are goldfish in there, as well, so, we needed a good, heavy-duty submersible system. We figured that two are better than one, with the grossness that these creatures emit, and, we set them up on two sides of the aquarium. Cleaning the filters each week, I've taken great care not to burn out the units, yet, last week, one died. This morning, the other one died. These are less than six months old. We invested in these because we thought they were heavy duty enough, but, apparently not. I'm so disappointed that we wasted over a hundred dollars for six months I bought this filter system, and, loved it so much, that I bought another. We have a 90+ gallon tank for our aquatic turtle, and, there are goldfish in there, as well, so, we needed a good, heavy-duty submersible system. We figured that two are better than one, with the grossness that these creatures emit, and, we set them up on two sides of the aquarium. Cleaning the filters each week, I've taken great care not to burn out the units, yet, last week, one died. This morning, the other one died. These are less than six months old. We invested in these because we thought they were heavy duty enough, but, apparently not. I'm so disappointed that we wasted over a hundred dollars for six months. Products shouldn't fail so easily. … more

Working like a charm. Easy to assemble, Currently using biological, zeolite and carbon media in it. Hopefully fry won't be sucked into it, it has very good flow rate.

Excellent pump, easy to set up, easy to clean. I have mine set up for water polishing, great!

This worked for about a day before it started slowing down. I thought maybe the bio load from my turtle was too much for it, so I cleaned it entirely and used it in an unstocked 55gallon, and it will sputter for a bit, but eventually the pressure is so low, and it’s so loud that overall it’s a waste of money.

It worked great when it actually worked. Unfortunately we sent the first one back before 30 days and Chewy replaced with new. The second one only worked for about 60 days. The piston comes loose and it makes a loud rattling noise. We tried to reach manufacturer but it was impossible to get through. We were really happy with it at first with the product because it really cleared up the tank but ......it just didn’t last.