Aries FilterWorks (AF-20-4010-BB) 20" x 4.5" Big Blue Mixed Bed Deionization (DI) Water Filter Cartridge - High-Purity Resin for TDS & Ionic Contaminant Removal - Semiconductor Grade, Made in USA Intelifil (IF-SM-KDF85020) 20"x2.5" 20 as the scale inhibitor depletes

as the scale inhibitor depletes over time regardless of water usage

Fits standard 10" housings

Calcite Neutralizing Media (A8021-01) – 0

Waterproof floating pH meter with replaceable electrode and automatic temperature compensation for reliable testing in any water environment

with rigid ABS or PVC center tube for structural support

Aries FilterWorks (AF-20-4010-BB) 20" x 4.5" Big Blue Mixed Bed Deionization (DI) Water Filter Cartridge - High-Purity Resin for TDS & Ionic Contaminant Removal - Semiconductor Grade, Made in USA Intelifil (IF-SM-KDF85020) 20"x2.5" 20 as the scale inhibitor depletesAries FilterWorks AF 20 4010 BB 20" x 4. 5" Big Blue Mixed Bed DI Cartridge Semiconductor grade deionization resin for ultra pure water in whole house, industrial, and laboratory filtration systems Mixed Bed Ion Exchange Made in USA ResinTech Resins 14 18 Mcm The AF 20 4010 BB combines cation and anion exchange resins in a 20" x 4. 5" double open end cartridge to remove total dissolved solids, minerals, salts, and ionic contaminants from water.