sera siporax professional reef sand For even more flexibility

For even more flexibility

0 in saltwater (higher than competing products)

which are advertised as stabilized to not raise the pH are generally washed in phosphoric acid and will leach phosphate into your water

or decaying

sera siporax professional reef sand For even more flexibilitySera siporax is a fully biological filter material for all internal, external and trickle filter systems, and for garden pond filters. 1 liter sera siporax provides as much settling area for bacteria as approximately 34 liters of ceramic filter material. Therefore 1 liter sera siporax ensures more than 200 liters of biologically clean aquarium water. Sera siporax is an excellent choice for small filters. Prefilter with sera biofibres or sera filter