The RedFlex™ 4-in-1 has its own Chemical Media Canal for the media of your choice. Within the canal you have the option to use our unique Chemical Media Cartridges specifically designed for this area to house various forms for media. In this sump, water flows from the skimmer chamber and into the chemical media canal. Once the water reaches this area, you have the option to have the water flow into the refugium section or straight into your return compartment via the adjustable flow gate. Each refugium has a built in frag rack with options for two positions.
This is the Chemical Media Cartridge for the RedFlex Sump (Sumps are sold separately)
