Hello Madalin. In Brazil we use to use ZEOLITE as a quick and cheap treatment for Mn and Iron removal, on low/medium concentrations. Some free information about it you may find on wiki: https://en.wikipedia.org/wiki/Zeolite Find some good local Zeolite provider on you region and talk to him. He'll help you on the design of a good solution, based on the parameter of flux, Mn concentration in and out, etc. (like the other fellows here already told you). Cya!

Published by Leonardo Zanata, Professor at Faculdades Oswaldo Cruz

Hello Madalin.
In Brazil we use to use ZEOLITE as a quick and cheap treatment for Mn and Iron removal, on low/medium concentrations.
Some free information about it you may find on wiki: https://en.wikipedia.org/wiki/Zeolite
Find some good local Zeolite provider on you region and talk to him. He'll help you on the design of a good solution, based on the parameter of flux, Mn concentration in and out, etc. (like the other fellows here already told you).
Cya!