Marine/RV iron filter and softener combo uses portable 2

https://shaneltpl744.tearosediner.net/best-iron-filter-for-iron-and-sulfur-combo-problems-softpro-s-take

Marine/RV iron filter and softener combo uses portable 2.5x10 cartridges, polyphosphate, and carbon block; quick-disconnect hose fittings, brass Y-strainer, and onboard TDS meter optimize campground well water for appliances.