Two Little Fishies NPX Screens for Phosban Reactors 4 3/8 in 2 Count

Plastic screen for use with NPX Bioplastics in our PhosBan Reactors. Use screens in place of the sponges, which must be removed. Each pack contains two screens. Universal size for the PhosBan reactor 150 or 550. Simple instructions illustrate how to cut the screen for a perfect fit.