Bio-cubes are great to add into your filtration system, like waterfall filters, to help clean your pond water. This bag of bio-cubes is an assortment of different types of filter media, varying in thickness and density, which is great for catching bigger and smaller particles. Bio-cubes provide greater surface area for bacteria to colonize.
We recommend putting Bio-cubes into a mesh bag before placing in your filtration system. This makes them easier to handle.