NICREW Aquarium Internal Filter, Submersible Power Filter with Multiple Function for Fish Tanks 2 to 5 Gallon, 40 GPH, 3.5W

Works great for my 5.5 Gallon tank, I actually modified it some in which then it works even better, inside the filter is a plastic basket that holds a small pouch of carbon, the basket has small holes, so I actually used the Fluval Zeo-Carb loose in there, it is big enough that nothing escapes! Works great! Then I trashed the little pre filter that comes with this, I felt it had large pores which let a lot through, and I got the Fluval Phosphate filters, and I cut them to size and put them as the pre filter, I think it makes it one of the most efficient filters I've ever had, and it SUPER QUITE I love that if I keep it just slightly above the water as it sprays from the long attachment it creates some bubbles, enough that my guppies are super happy, which is good because typically bubblers are very loud.

I’ve been using this small internal filter for a few weeks in my 5 gallons tank and it does a good job. It’s compact and easy to set up, and doesn’t take up too much space inside my aquarium. The flow is gentle enough for my fishes but still keeps the water moving and super clear. It runs pretty quietly too, which is a big plus, but it is not completely silent either. The only thing to note is that you’ll need to clean the sponge fairly often since it’s small, but that’s expected with a filter this size. Overall, it’s a reliable little filter for small tanks. Great value for money.

Just set up but seems to be working well! Strong flow and quiet!

A little strong for a 10 gallon, but surprisingly good. I would use it more for a 20 gallon unless you need a lot of water movement in your smaller tank. Keeps the water clear and the sponge will hold beneficial bacteria. It's quiet and the suction cups are good and hold it in place very well.

It’s a super nice compact size. Little amount of filter media though- and the flow is much too strong for most use cases. I have a 10 gallon which is the maximum this filter is rated for. It was still way too much flow, using the normal nozzle or the rainfall one. My beta investigated the jet and got blown to Canada. It is okay but adjustable flow would make it more usable

GREAT little filter! I have the 5-10 gallon unit in a 2.5 gallon tank. Because its acrylic (not glass) and there is no real stand for my setup, it seemed quite loud. I put some rubber pads under my aquarium and it deadened the noise significantly. That was strictly a problem with MY SETUP, not the pump! Water is clean and the fish are probably enjoying the jet of water in their tank, probably makes it feel like they're in an actual stream!

I live in Minnesota and use crappie minnows and fatheads for fishing. As the cost for bait continues to increase I don’t want to dump them out after fishing for the day. I tried an aerator only but noticed a lot of scum on the water after a couple days and had to frequently change water. This inexpensive pump seems to be perfect. The filter cleans the water and it would probably aerate enough just on its own. I still use my cheap aquarium aerator at the same time. The suction cup mount works great on a black 5 gallon bucket..Cheap and has worked very well for the past couple weeks. If you want to keep bait for a week or more I think you need to change the water every day or use something like this with a filter.

It works as filter should. But it would have been even better if it had flow control. I planned on using 2 of the 5-10 gallon size for my 20 Gallon Long tank. Bought 1 to try it and one unit was already too strong for my tank, I had to wrap the spray bar with some filter foam so as not to create too much movement in the water. I wish Nicrew would put a flow control system on it- I’d buy more of them.

Bad product l. It worked for 12 hours and stopped completely. Unfortunately I could not return it as I passed the return window. Don’t buy it

Works fine. Quiet. A little too powerful for my 3 gallon tank but I was able to diffuse the output so our Betta can still enjoy his home.

El artículo es muy chico, se tapa constantemente el servicio que da no ca de acuerdo a su costo.

I bought every adaptor I could find and still cannot plug it in properly. Very annoyed that it even needs an adapter in the first place. Basically unusable.

I bought this product, but when I used it for the first time, it didn't work. What a waste of money. I wish the seller would give me a replacement. 😢😢