Yousheng Filter Sponge Useful Activated Carbon Design Largest Adhesion Black Aquarium Biochemical Filter Foam for Water Tank

We hope the fish don't die I will be back in 2 weeks of use. It's a good product. I do this: in the water aquarium I did not take out the water but I wash it with the glass sponge and all the objects in the aquarium that do not come out. Then I take out half or more depending on how dirty the water is. I add clean water and in the glass dissolve the dust with lukewarm water and pour in water. I take more water and pour it to mix. And the filters and aeration start more abundantly. 5 min and crystal clear water. Residues and impurities seem to clog and the filter absorbs them quickly. I recommend. They have nothing to do with fish.

I hope that this product will also serve me like the others that I have ordered for my aquarium, the others of excellent quality. Thank you very much Jom.

I have not tried it yet but I would like to know in Italian if I have to remove the fish from the aquarium and if I have to put the whole bag thanks

Fast delivery, has yet to try it, hope the fish survive!

the product is great. will order it again.

Exactly what I need. For years already.

Exactly what I need. For years already.

Very good