TasoI think you may be incorrect in the different sieve mediums and their absorption rates or effectiveness of water. look at the chart in the link for % of H2o the sieve can hold in suspension. 3a and 4a are a little lower than 13x.https://en.wikipedia.org/wiki/Molecular_sievehttps://www.deltaadsorbents.com/SDS-Specs/Molecular-SieveMike