uxcell XINYOU XY-380 Aquarium Fish Tank Biochemical Sponge Filter, 4-1/2-Inch (1-Pack)

Bought 4 of these to put 2 in each of my axolotl tanks. Great price and they work so good keeping the water clear

I liked the look of quality, the short delivery time. I will be using it for fish breeding.

Perfect for raising fish fry

Good filter would recommend for 29+ gallon aquarium.

I bought a fluval canister 306 for my shrimp tank and the tube was just a little to small on my fluval so I bought o rings 3/32 and stacked them. Now it fits snug and perfect.

Prompt and as promised.

Does exactly what it needs to do. I have no complaints at all. I modified it to fit an air stone and BOOM, new kind of filter.. Ordering more as needed.

Mercy! This filter is enormous! I am using this in a 40 gal. tank and it is doing an excellent job of keeping the water clear. I have a natural sand bottom and lots of plants, so with water changes the sediment really gets stirred up. This filter (running with a Whisper 10) has the water clear again after 1/4 water change in about 30 min. Absolutely amazing! CONS: The way the tube is at the top, a massive amount of bubbles enter the water. This would be fine if you dont have a planted tank. I have a CO2 system, so I needed to adjust the air return to keep the water surface more still (to keep CO2 in the water). I just added another length of tubing that put the end of the tube closer to the surface, and now the surface is much less, um, bubbly :)

Its a big ol sponge but it works great!

If you want to have a nice clear tank, this water buffer is perfect. Just attach airline and hook up to your pump.