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Phosban 550 Replacment O-Ring
Reticulated foam sponges used to replace the original parts from the Phosban Reactor 150. 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.

Two Little Fishies
Phosban 550 Replacment O-Ring
$3.15
Available