After catalytic decarbonation with caustic soda, has anyone experienced microsand residue in the filters?
excerpt: The lower part of the reactor is filled with an inert material 5, granular, fine particles of average diameter generally between 0.1 and 0.6 mm. This material generally consists of sand but equivalent media can also be used, such as limestone powder, pounded brick, or other. Thanks to the inclined plates in the upper section of the reactor, one can also use lighter-than-sand materials such as slate, pumice, anthracite, chamotte, etc.
Is the sand a component of the filter or a byproduct of its use?