As you intend to use this ...

Published November 16, 2017 20:39 by Peter Niesslbeck, president/chairman of VBIO-BY - Fed. Assoc. of Bavaria @ VBIO - Verband Biologie, Biowissenschaften und Biomedizin in Deutschland e. V. (www.vbio.de)

As you intend to use this water for desalination, you could cascade it in an aerated/oxigenated filter (sand/gravel) with 2 or more stages.
For potable water, you will have to treat the filter cascades regularely, e. g. by using peroxides.

Best regards, Peter