UPETTOOLS Mini Aquarium Sponge Filter, Small Internal Fish Tank Filter Detachable Submersible Filter with Air Stone Suitable for 5-20 Gallon Tank (Air Pumps and Air Tube not Included)

I used this little filter in my "clinic" tank. I have treated 3 balloon platys in a gal of water and it worked perfectly. It filtered the water and at the same time it produced a good amount of air.I treated my fish by dipping them in Methylene Blue before I dropped them in the clinic tank. The filter got stained but it did not affect performance.One thing to note is that it doesn't come with the pump and air line. You will have to have those separately. It does come with suction cup so you can stick it to the wall and it holds it in place really well.This filter really works and since my platys have now recovered, I'm putting the clinic tank away with the filters until I need it again (knock, knock). It's very reasonably priced and it is very functional. I'm so happy to have this in my clinic tank!

I just got into fishkeeping as a hobby. This filter is placed in my tank where I quarantine small plants it’s pretty quiet and functions. Well, my sponge is starting to get color to it which means it’s working very well built larger than I thought it was gonna be but I’m OK with that. A small amount of bubbles come out so seems like it would be great for sensitive fish. Seems like it's well-made and sturdy. Very easy to assemble comes ready to use and I just put it on the end of my air hose and it seals well. Great filter and I will be buying more for my other fish tanks

Been in the hobby 40 plus years. These among the easiest to use and effective little filters I have ever used. They are clean able, media can be replaced as necessary and adjustable to use with any small aquariums from a Betta habitat or fry rearing. I found using a small suction cup attached to the supply air line really helped holding in place. Plan using these in all my plant and fish raising set ups. I doubt one can find a better multistage small filter for a better price or quality.

My son loves it

It’s too big

well I like this little filter but i can’t seem to find the correct size sponge for it. company seems to make sponge for larger sizes nut not smaller size. had ti but sheets if sponge and cut it myself to fit.

The media could not be loaded. I just installed this filter and aerator combo in my small 2.5 gallon TopFin corner aquarium. The filter that came with it didn’t last more than 3 months. I set this up in just minutes, at first I thought the bubbles were so big and worried the current would they’d swirl my small fish around the tank. NOT SO! As you can see in my video, the fish are no larger than 1 1/2 “ in length, small, one in particular. They was no problem with it pushing them around, so I’m relieved I don’t have to find a way to adjust it. The water turned crystal clear and they were able to eat… …. so this item creates a nice flow in the water but nothing to worry about. I came back 2 hours later, two of the fish were swimming in and out of the bubble stream, playing in it. That sealed the deal for me! They’re happy, and I ordered a second one today for my Betta tank. Planning to use filter floss when it comes time to change the sponge, to see how well it works as an alternative to constantly buying sponges. If any big changes I’ll update this review.. It is also really aesthetically pleasing, and I’m happy that it doesn’t have to be clipped to hang at the top of the tank like an eyesore, as most filters. Praying it holds up well. When it comes time to wash/replace the beads inside, I plan to use either small bio beads or zeolite crystals which are being used as my gravel.. (TIP: YOU CANNOT ADD ANY SALT IN YOUR TANK IF YOU USE ZEOLITE BECAUSE SALT WILL CAUSE THE ZEOLITE TO RELEASE ALL THE NITRATES THEY ABSORBED BACK INTO THE WATER.)(Note: the actual pump, and air hose tubing, you do have to buy separately to attach to this filter/aerator. The pump I bought on Amazon. is small, blue, sits behind the tank, and for small tanks up to 10 gallons.)

I bought 2 of these, the smaller one for a 10 gallon and now the larger I will have in my 29 gallon. I like that it increases area for beneficial bacteria, and that it doesn’t have activated carbon, just the media and sponge. It’s super easy to clean and instead of buying the filters which are a little spendy for what you get, I just replace them with polyfill which is super cheap. It doesn’t come with the tubing or pump, but for this price I would think that would be obvious. I do have mine partially covered by substrate because it doesn’t really remove much of the bioload (fish waste and decaying plant matter) of the tank, just houses more of the ammonia and nitrite eating bacteria, and provides some aeration.