For Iron Removal, you could ...
Published by M. Musyafa Wiryanto, Business Development Dir. at PT. Pancawala Indochemical
For Iron Removal, you could use Manganese green sand Filter and keep the free chlorine in 0.5-1.0 ppm in range for self regeneration. Chlorine for High pH >8.5 will not effective nor work, its will additional as OCl- not as HOCL, if want to make desinfectant in high pH you must use Bromine based.