Red Sea Max-Nano 225 Micron Thin Mesh Filter Sock (2pack)
These small filter socks or bags are specially designed for the redsea max-nano all in one tanks. These are direct replacements for the ones that came with your tank
Each box conveniently comes with 2 filter bags
If you have a regular reefer tank don’t buy these ones as they will not fit your 4” ring. These are only for the smaller max nano tanks.