The high quality Aliflor that Glass Box Tropicals offers is an excellent material to use as a drainage layer, or as a plant growing medium. Aliflor is equivalent to Leca or Hydroton - they are all expanded clay balls. Aliflor is one of the highest grades available and frequently used as an orchid substrate.
The picture shown is representative of the size of the product, what you receive may vary slightly. What is shown as an example is not equivalent to two liters in the detailed product photo.Two liters is equivalent to 1/2 gallon. 4 liters (2 bags) is equivalent to just over 1 gallon.