Answer
Feb 20, 2026 - 04:06 PM
Great questions! Here's what you need to know:
Does the media need to be replaced? Yes, eventually the MetSorb media does need to be replaced — but it lasts a long time. For most homeowners, the media typically lasts 4 to 5 years, though it can range anywhere from 2 to 6+ years depending on your specific water chemistry. The key factors that affect media life are:
- Your arsenic level – higher arsenic concentrations will exhaust the media faster
- Your water's pH – MetSorb works best in a pH range of 6.5–8.5, and media life drops at higher pH levels
- Iron and manganese – if your water has elevated iron (above 0.3 ppm) or manganese (above 0.05 ppm), it's important to pre-treat with an iron filter, as these will significantly shorten media life
- Your daily water usage – more water processed means the media works harder
We always recommend regular arsenic testing before and after your system (at least annually) so you know exactly when it's time to replace — you don't have to guess.
How much does replacement media cost? You can find our replacement MetSorb HMRG media here: 👉 https://www.cleanwaterstore.com/arsen...
Media is priced per cubic foot — the amount you need depends on your system size (our M1 systems use 2 cubic feet, M2 uses 4 cubic feet, etc.). Replacing the media yourself is a straightforward DIY job.
Do you have to be present for the backwash? No — the backwash runs automatically on a timer (typically every 2 weeks or based on a metered water count), so you don't need to do anything. The system handles it while you're sleeping or away. The backwash simply reverses water flow to clean sediment out of the media bed and keep it working efficiently. It uses very little water compared to other systems.
If you'd like us to give you a more precise estimate of media life, just send us your water test results showing your arsenic level, pH, iron, and manganese — we're happy to take a look! Just email our support techs at support@cleanwaterstore.com
