https://www.bulkreefsupply.com/brs-chlorine-voc-carbon-block-filter-5-micron.html
Says 5 micron
Sent from my iPhone using Tapatalk
Says 5 micron
Sent from my iPhone using Tapatalk
You need these
https://www.bulkreefsupply.com/matrikx-pb1-carbon-block-0-5-micron.html