RedSeareefkeeper

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Hello,
Does anyone have the original sponge for there Deltec mc500 / mc501 and can they compare it to a sponge of known porosity (pores per inch aka PPI) or measure it with a ruler?
I bought a mc500 used without the sponge since it's so easy to diy one and you won't make me pay 15 bucks for that.
I just want to make sure I have the right porosity
Thanks! image (1).png image.png
 

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