Hydro-Sponge Filter I--HS910 - Aquarium Technology, Inc.

I bought this sponge filter for my angelfish, who were suddenly spawning every week. The babies were not able to survive if I left the regular filter on. I ended up having to move them to a ten gallon tank, and thus the need for this filter. I have to say, I've never had a better filter. You attach an aerator line to the inside, and that's the only thing you need. The air bubbles oxygenate the water while they also work to draw water through the sponge. All the muck that usually accumulates pretty quickly in my tank was drawn in, and the sponge works to break it all down naturally, which is actually healthier for my fish and plants. And no babies were harmed by this little device. it's gentle, but effective. And the best part is that you do not have to buy filters! Just rinse and squeeze the sponge under room-temp water for a moment and you're done. I'm definitely going to replace my old money-devouring filters in my 55 gallon tank with some like this. These are well worth buying, and actually pretty cheep considering it all. I advise anyone thinking of getting one of these to make the leap. You won't be sorry.

This pump is great, not loud, move work enough to keep tank clean but not stress out my fish. Filter works great, weekly testing of water shows that it's perfectly balanced. For my 10-gallon tank it great and I would highly recommend. Also, cleaning is super simple and fast. You cannot control the power of the pump, they do have those option available for a little more price, but honestly if you have one tank that you are starting, I'd say start with this.

After purchasing a pair of small salamander larvae and moving them from their plastic 'critter keeper' to a 5.5 gallon aquarium once they had grown, we were at a loss for filters. We tried a hang on back, and the current was just too strong. We tried an internal filter and not only did it raise the water temperature substantially, but just didn't work very well. At the advice of several members of a salamander forum, I ordered this filter and couldn't be happier. It's quiet, much more effective than the other filters we've tried, and oxygenates the water without creating harsh currents and/or water flow. Set up was a breeze and our caudata larvae are already much more active and spend a lot of time out in the open now that the water is so calm. The fact that this filter keeps the water crystal clear also makes viewing them much easier. So whether you've got fish fry, amphibian larva, or something that just needs peaceful water conditions, I'd definitely recommend this product. Two thumbs up.

Make sure you check it when you get it! Just got mine in damaged, manufacturing box looked like it went thru a boxing match and item wasn't even in the packaging

Easy to assemble; nice, heavy base keeps it stable in the gravel. Nice low-flow filter doesn't kill frogs or baby guppies. Update: It's now 2019; my NEWEST filter is at least a few years old now. My oldest is probably 6ish years old and it's still working well, but finally time to replace the sponge part. I appreciate that this company sells the sponge part separately, so that I can save money and help the environment by re-using the parts that are still in good condition (the base, frame, and chimney tube). Tip: you can attach the airline directly to the nub inside the plastic frame, which gives you larger bubbles, or you can thread the tube a bit further down and connect an airstone to the end for smaller bubbles. The airstone and smaller bubbles will make your air pump work a bit harder, but it does make for a lot less splashing than the larger bubbles/no airstone option. The filter functions either way.

I ordered two and both came assembled. When attempting to disassemble, inorder to add an air stone, the bullseye was impossible to remove. It snapped right off. Going forward I will only use Aquarium Co-op. They care about this hobby, have integrity, and offer loads of support because they want people will succeed and thrive in this hobby. They deserve our support because they are passionate and want aquarists to love what they do just as they do!

I love this Filter, it's quiet, looks ok, fits nicely in the tank, is really sturdy, and really does it's job. I wanted to test it so I took it out and let my tank get pretty dirty, I put a new sponge on and stuck it in there with no attempt at cleaning it first and within hours you could see a difference. I just purchased my 3rd and 4th sponge, which last a long time and only have to clean the filter maybe 1 time a month, if that. I have a Turtle in the tank with minimal fish. OH Easy to clean too.

I bought this for my Axolotl tank as I needed a sponge filter so they couldn't get their little fingers or gills stuck in the filter uptake. I was very happy to find one at such a great price and with such great reviews so ordered it immediately. Upon arrival I discovered just how huge this monster is! I should have read the dimensions listed (though would have gotten it anyway) so I would not have been shocked by the size. A 4 1/2 in diameter takes up a huge amount of space in a 10 gallon tank (they are like what, 18 by 12?). Just a heads up for people looking at this product. Even with the huge size, this product seems to be working good and I have no complaints with it. I actually find the bubbling sound of the top quite soothing. :)