Tetra Carbon Filter - Large (2 pack) Now a Carbon Filter as innovative as the Whisper EX Filtration System it's designed to fit. Tetra Carbon Filters' layers of multi-density floss effectively trap even the smallest particulates while activated carbon rapidly eliminates odor, discoloration, impurities, and toxins.
The result? Water that's clear, healthy, and polished.
Carbon Filters come ready-to-use and include one patented Timestrip change indicator for each Filter.