boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 10-30L Fish Tank (No Include Pump and Tube)

Amazing product. I am so amazed of this product. I have a small 60L tank and I wanted one extra filter and beside that, it has a air feature. The item is amazing, very good quality and does its job. Small and cute.

Been using for a while. Works well as a medium for bacteria in fish tak. Water is crystal clear. Only problem is when I put on the bottom of my tank the bubbles stop. Good job I have a bubble maker as well to move the water. My air pump is brand new and can put air through 2 things, so I have no idea why it works when the filter is only submerged a few inches, but not when 12 inches down.

For our small tank with just a couple of fish in this is a very good fit.It's easy to clean and use and look good as well.

I bought this filter with the matching air pump. I am very pleased with its performance and the sponge within the filter is visible and very effective.Together with the air pump my fish are very happy and lively.

Not cut to the correct size and very poorly fitting. I had set up a subscribe and save which I will now cancel.

Cheap enough and nice size. Doesn't seem to work as well as the reviews say. Setup ok with a good pump, water still has bits floating in it prior to putting fish in? Will wait and see.

Great little filter , easy to set up, works well, seems very powerful.

This little filter has saved the day, i have a new aquarium set up, and used all the tap safe and filter aid products and let the filter run for 2 days before getting the fish, after 2 days my water was going milky, the soultions i added were just creating a milky film and not being mixed by the filter, infact i very much doubt the new filter was working at all. I got this to assist my existing filter, it arrived today just intime, as i couldnt see through my tank as you can see in the 1st picture, i instantly set the filter up, it took less than 1 min to attach it to my air pump and plonk it in the tank -pic 2, to my utter amazement, 5 hours later my water is almost crystal clear -pic 3, and the fish are now swimming about and playing happily in crystal clear water. I have purchased a 2nd one and will be binning the crappy filer that came with the tank, 100% reccomend