FluvalU1 Internal Filter, 55 Litre

I really like it. It works well for my 30l aquarium and I prefer this one rather than Stingray, that I had before. It is easier to clean, less chances for fish to be trapped and there is a space for bacterial substrate. And it is silent. The only downside is that you cannot change sponge without detouching the filter from the wall. I hoped it will be as easy as with Fluval U2. But it's very minor problem.

Great little filter works well

It's a great filter, just make sure your check in on it every day.. It stopped working and I hadn't noticed until I went to do a filter clean and water change. The motor wasn't running at all, I had to flick the little fan to get it going again. I now check it daily to make sure it's going. Could be my fault, however.. I may have had the sponge too close to the fan? Who knows.

Doesn't come with a UK plug. Also doesn't mention that there aren't any cartridges, was planning on transferring my ceramic media so I didn't need both filters running. Description is deceptive, now got to faff around sending it back and looking for another filter

this filter pump may be the quietest i have hadi am current sat 2 meters away and the house alone and cant even tell if its on or not

Best filter I've had, my previous filter finally failed so I purchased this 'Fluval U1' as a replacement I knew that it was going to be good but I was amazed at just how good!Previously I had to clean out my medium size fish tank (Three Goldfish) approximately every two weeks, with this filter now installed the water stays clear for over four weeks.Well worth the extra cost.

I ordered this filter from Amazon.co.uk, expecting a UK plug. Unfortunately, it arrived with a US plug, which was inconvenient and required me to purchase an adapter.Despite this, the filter performs well. It runs quietly, keeps the water clean, and is easy to set up. If you can deal with the plug issue, it's a good choice. Just be aware of the inconvenience for UK use.

Brilliant. Excellent amount of water circulationupdateAfter 1 year the water is not circulating at all! The motor and fan are all working tbe filter sponge is clean and no water is coming into the tank.I bought a new one which is working really well. I also purchsed a new impeller for the original one. (Customer services refused to replace it even though it had a guarantee!)

Detta köptes till frugans akvarium. Hon tycker Fluval:s grejor alltid alltid har fungerat bra

Manque les filtres. A acheter séparément mais ce n'est pas indiqué ici. Dommage. Retour et remboursement.

Sicuramente non ci si aspetta un mega filtro ma ci si accontenta, per me personalmente non è un buon articolo.Non mi piace, la spugna lascia passare l'acqua senza essere filtrata, piccolo e poco potente, andrebbe bene per un 10 litri

Purchased of Amazon Australia and plug was European plug. It’s not the type of filter that I thought it was.

I added the U1 to my 20 gallon tank that already had a 20 gallon filter. I wanted some flow, and extra filtration since I have a few more fish than I should.The sponge covers all inlets, so my Kuhli Loaches and shrimp aren't at risk of being sucked in, which is extremely nice. Any other filter or pump I've used required me to superglue sponges or screens to the inlets. I also love that the sponge is easily removeable via the lid, so I can pull it out and clean it without moving the filter. It also has a removeable piece in the center that I removed and replaced with a media bag full of Zeolite and Carbon blend with some compressed peat for acidity.Mounting the filter was the only downside I had with it, but because of the easily removeable sponge I'm not knocking off a star for it. The U2 and higher models have a bracket, the U1 just has 3 easily removeable suction cups (not a good thing) so once you stick it on the glass, if you even try to move it the tiniest bit to position it just right the suction cups disconnect from the unit and stay stuck on the glass, forcing you to pry them off, pull out the filter, reattach the suction cups, then reposition it again. That said, it stays put, its fairly small, and looks nice.For a filter that attaches to nothing but the wall, it's very quiet. Much more so than the two cheaper units I used. Obviously a HOB will be quieter since it isn't attached to the entire tank turning your tank into a giant vibrating subwoofer, but for something that DOES transmit all of its vibrations straight into the tank its very quiet. My Marina HOB is quieter and the U1 does make a very faint grinding noise, but I can only hear it right next to the tank and 5 feet away it is inaudible.Filtration is great as well. I use it as a second filter, since my HOB is stuffed full of loads of different media so the flow rate is lower, so this serves primarily as a bio-filter to reduce ammonia. For that purpose it does fantastic, and the small media bag in the middle for some extra filtration is nice too. The flow is the best part here though, it keeps my substrate crystal clean and any gunk that gets kicked up by the loaches or cories immediately gets swept into the current and sucked up by the filters. If you're using this as your only filter, definitely add some zeolite and carbon to the middle of it.All said, it's a fantastic filter and I honestly wish I just had one U2 for my 20gal rather than two separate filters.