NICREW Slim Aquarium Filter, Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums, Adjustable Flow, 42 GPH, 3W

This filter works perfect for a little Top Fin 3 gallon tank. I have a small tank set up for Corydora fry and needed a decent filter with an intake pipe. The filter that came with the aqaurium was trash, and I did not like it. It pulled from the bottom and kept sucking fry up. The first replacement filter that I got did not have a place for carbon or any type of sponge. This one is seriously perfect. It has a carbon cartridge with a sponge and also a sponge filter for the intake. It helps pre-filter AND keeps from sucking anyone up. The replacement cartridges are not expensive (6 for $9.99 or 12 for $14.99). It is very easy to clean and does not make any splashing sounds. It has a big enough area to add your own media, if needed. The carbon keeps everything circulating to avoid any funky smells. *I just put it in before taking photos, so the tank is not the cleanest.

This NICREW filter is pretty decent. It's small and doesn't take up much space in my tank, which I like (I have a betta named Bubbles, she loves it). The filter does its job well enough, keeping the water clean and clear. I haven't had any issues with the flow being too strong or anything, though sometimes I wish it was just a LITTLE stronger, you know? Anyway, it's easy to set up and use. (I accidentally put the sponge in backwards at first, but it still worked fine). It came with everything I needed, so no complaints there. Overall, this filter is great for small tanks like mine. The adjustable flow is a nice feature too, although I don't really mess with it much. And hey, if you need to clean the media, it's super easy and quick to do. You can't beat that! Definitely would recommend this one to anyone looking for a reliable and quiet filter for their small aquarium.

I like this filter as it is easy to assemble, it is safe for water not being able to absorb into the electrical box and cause major issues. It’s small and quiet. The filter functions well if you upkeep on your substrate or gravel. Otherwise you will have to clean and scrub this filter weekly (which I do anyways). I am thinking of upgrading to a higher quality filter that isn’t hard to clean and isn’t all plastic, which may be hard to find but in the mean time I am happy with this filter.

This little filter does the job on my 6 gallon cube; its the perfect size. It comes with a pre-filter sponge, which is nice. I do not change out the filters (DON'T DO THAT, you'll lose all your cycled bacteria), I just rinse it with the tank water when I'm doing a water change if it even needs it. Same for the pre-sponge. There is juuuuust enough room to add some extra media like more sponge or filter floss if you want, but I haven't needed to do this as it does a good job catching everything! My water stays very clean with this and the plants, although my bio-load is low with just a betta and two nerite snails. The adjustable flow works great! I keep it around the middle. And this thing is QUIET. It's in my bedroom and it's essentially silent. This is a wonderful little filter. You can't beat the price. The flow and size are perfect for a tank around 5 gallons, or could probably work well on say, a ten gallon shrimp tank. This brand never disappoints me!

I have 3 of these and they keep my tank very clean while also maintaining a healthy cycle. They've been safe for my bettas and snails, and so far they've held up well!

The filter in this aquarium is very quiet and stable, almost silent, and the water flow rate is adjustable. I really like this filter.It's so quiet, I can't hear a sound at all. I'm very surprised by the quality.

It is small, quiet and works well. However, mine just stopped working after only 8 months. I always clean it well so I quite disappointed. Only bought another one because I don’t want to waste all of the filter cartridges I still have. ☹️ Update: the seller was kind enough to refund me after I had to purchase a new filter. That does my heart good. My new filter is working perfectly and doing a great job!

Perfect with my 2.5 gal aquarium. Had it about a month and no problems, nice and quiet.