Two Little Fishies Foam Disks for PhosBan Reactor 550 - 2 pk

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.