com the HM Digital web site Look at the COM-100 and the pH-200

we are a trusted supplier of DI resin products for refilling for your saltwater aquarium or laboratory water purification system

or both which controls the maximum safe operating pressure

✔ STAGE 4 : 150 gallon per day (GPD) RO membrane with the best 98% rejection rate in the industry

This is the best dual tds meter we have tested to date (Jan 2026)

InLine Carbon Filter (3/8”) pump com the HM Digital webIn Line Carbon Filter This is an in line GAC carbon filter and is the final Taste and Odor or Polishing filter. Life is 1500 total gallons or 375 pure water gallons. About one gallon per day will last you one year. If you had to have one filter.. this is it. Dimensions and Weight Dimension: 10" x 2" Weighs: . 9 lbs Illustrations Diagrams Instructions How to Change Filters How to use Push In Quick Connect fittings