Penn-Plax Small World Replacement Aquarium Filter Media (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C

This is working great

So I read a lot of reviews people complaining about noise, which if u buy the kit with the air pump it is super quiet. Then people complained about not being able to take the thing apart to clean. I mean for $7 a month I can replace the cartridge. The power is controllable which is nice as it doesn't suck my betta fish in like most filters do. People complained about it making there tank cloudy but I rinsed it really well and ran it for 15 minutes in just a bowl of water to get any excess gunk out and it worked just fine. Didn't make my water cloudy at all. And with in a half hour of running I could tell the water clarity was getting better. I think this is a great filter for my tank which is 1.6 gallons and didn't come with a filter. Very small doesn't take up to much room in his tank. Also filter replacement is very easy. You just pop it out and stick a new one in.

I love this filter and pump set! It’s perfect for my bettas it’s not too strong but it does the job without moving the water too fast for the betta.

The media could not be loaded. I won 2 goldfish at the fair and set up this little 2.5 gal nano tank for them. Goldfish dirty their tanks quickly so I needed something small to help filter the ammonia and nitrates from the water. This little filter works great! The suction cups hold it in place well and it keeps the water clear for about 2 weeks before it needs a water change and a month in between a complete cleaning as long as you don't overfeed the fish. So far the cartridges are lasting 4 weeks before needing to be changed out which is a simple matter of popping the old one out and popping a new one in. The only thing I've found it doesn't do that well is filter physical particles from the water such as excess food and fish excrement so it looses 1 star for that, but overall I'm very happy with it and so are my goldfish.

The media could not be loaded. This nice small filter set is hard to find in stores. And it is easy to set up and use quickly for small fish tanks, like mine is 2-1/2 gallon aquarium. See video.The price was reasonable and I received it fast in new working condition. I bought 2 sets already and will buy more when needed if price is not inflated. Thank you seller and Amazon.com staffs 👍👍👍👍👍😊

I got this extra filter to provide extra filtration as well as some bubbles to “break up” the water surface. It does an excellent job of the filtration part…but the bubbles were different than what I was expecting. The bubbles aren’t the fine bubbles you’d see from an airstone – they are actual bubbles you’d see if you were to stick a straw in the tank and blow – this causes the tank to be noisy when the filter it on. So heads up to you if you’re looking for a very quiet filter – this is not the one.

LOVE THIS FILTER!!! I have a beautiful male crowntail betta. He had such an amazing tail but the filter that came with his tank sucked him against it and has ruined his tail. Also, the current it created made it impossible for my baby to swim. I have been on a hunt for a filter that wouldn't suck him up/against it, and he could swim with ease. He has a 5.5-gallon tank. I came across this filter and decided to buy it because it is really cheap and if it didn't work I wouldn't be out much money. It is easy to install (mine has a small issue with the bottom suction cup not wanting to stick but the top one stays in place and holds it tight.) and its current is perfect! (lower you place it in the tank the harder the current.) It has yet to suck him against it (I have had it for a month and a half and haven't needed to replace it yet), and he can swim with ease. It keeps his tank nice and clean! The air tubing does get a little grimy on the outside but you can rinse it off. Now for noise.. HARDLY ANY the only complaint is the little motor does like to buzz if it isn't placed exactly right. Now for suction... It does fantastic at cleaning but it doesn't always like to get my cats fur that he so graciously dumps in there while harassing the poor fish. I give this a 95%! LOVE THIS FILTER!

This filter is awesome! It is one of the best filters out there for small aquariums less than 10 gallons, esp. since it is a bubble filter which produces very little friction to the water surface if you add a flow control valve between the tubing. Another top option for small aquariums is to use those very small sponge filters or corner filter made by Xin You brand.1/19/16: My 1st review posted December 28, 2015 is shown above & gave it 5 stars. Now I have here my 2nd review on it, I'm giving it 1 star. I originally thought it was an awesome filter for small aquariums less than 10 gallons. After just about a month of use I had to clean it and then found out something about it that really made me mad- you cannot take out the foam to rinse it! This makes it incredibly hard to fully clean to re-use which is why they sell replacement cartridges. However, I think throwing away the cartridges is extremely wasteful since they don't look cheap and will cost you a fortune if you throw them away after each month. I would instead maybe buy 2 or more extra cartridges and cycle through them. Would have to find a more effective way of cleaning the filter sponge inside other than swishing it around in a small bucket. Anyone have any suggestions? Anyway, from now on I'm going to stick more to miniature sponge filters for my smallest tanks.