Phos Ban Reactor 550 Replacement Foam Discs 2 ct. by Two Little Fishes

Black reticulated foam sponges used to replace the original parts from the PhosBan Reactor 550.

These replacement sponges may also be used for dividing the column in a reactor to segregate different types of chemical filter media, such as activated carbon, PhosBan®, or adsorption resins. Packaged as a set of two.