Banoo, Water Purifier Cube, Eco-Aquarium Filter Active Carbon ​Ultra ​Strong Filtration and Absorption ​Aquarium Filter ​Media Activated ​Charcoal Cubes ​for Ponds, Fish Tank, Water Tan, 4X4X4 Inch

I have 2 water troughs side by side and the horses tend to choose drinking from one more then the other. Well I just bought one cube to try it, put it in the trough less used and they are drinking from it more now. I’m amazed at how well this has worked and cleaned the water and the trough. Buying another cube now😊

It does not work and it fell apart in a few minutes in the water completely contaminating the water. If I could give 0 stars I would. Waste of money, and I can't return it because it disintegrated.

Helps to keep my fish tanks clean A++

It really works

This item did not work at all, it had completely disintegrated within two days . Don’t waste your money.

At times my water becomes cloudy due to the shift of the substrate, and or water changes.. I’m not a big fan of dosing my tanks after the fish are in it.. the banoo is a perfect product for the job.. I love it, period.

This thing was horrible and not worth the money. It literally fell apart into a ton of pieces when it went into the water

I don’t know if this is having any productive effect. So far, just leaving black bits that fall off it at the slightest water movement.