Omnipure - Q5486 - 8" x 2.5" Q-Series Twist Off GAC / Phohsphate Filter; Scale Inhibitor ScaleStop (NSS-948RM) Replacement Anti-Scale Media for 9x48 Tank ; 4 Liters it's a sign your source

it's a sign your source water has higher sediment or chlorine levels than average—consider adding a 5-micron sediment pre-filter upstream to extend the carbon block's life

TDS 1413 Calibration Solution Pouch (1000 PPM)

and sediment before water enters the mineralization stages

Four-Stage Purification

Omnipure - Q5486 - 8" x 2.5" Q-Series Twist Off GAC / Phohsphate Filter; Scale Inhibitor ScaleStop (NSS-948RM) Replacement Anti-Scale Media for 9x48 Tank ; 4 Liters it's a sign your sourceThe Omnipure Q5486 is an 8" x 2. 5" inline filter combining granular activated carbon with slow dissolving crystalline polyphosphate to reduce chlorine taste and odor while preventing scale buildup in water fed equipment. Designed for the Q Series twist off system with automatic shut off valve, this dual purpose filter protects ice machines, coffee makers, beverage dispensers, and reverse osmosis systems from scale deposits and corrosion.