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

As described. Can’t use air stone.

I bought this think a couple of weeks ago because I was having trouble keeping my tank clear Ive tried everything when I go this sponge I couldnt wait to use it. it was wonderful I love it I would recommend everyone to buy one where I live at they do not sell them in the store

These are fantastic

What could I say they work great cheap best price online I run about 40 of them

no air stone to replace. Which I thought would be nice, but was unable to control bubble size to tune water movement.

First time using a sponge filter as I was never a fan before, but for the price it worked pretty good in my barebottom discus tank. I forgot how much I paid, but I remember it being a lot cheaper than what they charge at the pet stores. Overall, its been a month and im very happy with the product.

I love it so much

Great for breeding tanks

This is a great filter. I love sponge filters and have them in all of my 12 tanks of different sizes.

Works well. I use this in our goldfish pond to help keep the water clear. It really helps keep the water nice. Havent list any fish, so Id say its working