IN WHAT ORDER SHOULD I INSTALL THESE FILTERS ?

[Ordie]

Installing a whole house well system for 2 adults, containing a Big Blue 2 Stage Filter, FLECK Controlled Whole House Digital Water Softener System - 24K Grains, and UV Sterilizer. Maybe a sediment filter 1st?
In which order should they be installed? Seperate the BIG BLUE filters, or keep together?

Very low Hard Water
Arsenic level is 18 ug/l
Coliform total is 46L MPN/100ml
Iron is .05 mg/l

FLECK Controlled Whole House Digital Water Softener System - 24K Grains https://www.ebay.com/itm/FLECK-Cont...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

UV Sterilizer https://www.ebay.com/itm/Ultraviole...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

20-inch 2 Stage Big Blue Whole House Filter with Carbon & Arsenic Removal Filters CF2-4520-AACB

 

[Valveman]

In series those big blue filters will be primary and secondary. In parallel they would handle twice as much flow rate. Filter before the softener.