Replacement polyphosphoric crystals for the Stiron washing machine filter by Aquaphor. Reduces water hardness by increasing detergent performance by up to 30% (for approximately 300 washes, depending on the quality and hardness of the water in each area).  

The polyphosphoric crystals dissolve in water and essentially coat elements such as iron, calcium, magnesium, etc., making it impossible for these elements to "precipitate" out of the water and create the known problems associated with "hard" water, such as the formation of salts in pumps, washing machine resistors, etc. The filter can be easily recharged by the user, by unscrewing its cap and filling it with a new quantity of material. Attention: The replacement is not intended for drinking water!