Luis F.
Necessary replacement
19th January 2021
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Oase - Pre Filter Sponge - BioMaster - 30 ppi - 6x
Oase Biomaster is my go to filter, but this replacement is close to mandatory (as well as changing the rest of the filter media). (read more)
Replick88
Pre Filter Sponge
18th April 2024
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Oase - Pre Filter Sponge - BioMaster - 30 ppi - 6x
It is so Bad for company to make product and you need 999 more stuff to work fine, so bad for OASE Bio master 600, and some for Filtosmart 60(worst filter ever made)
Edgar R.
Best for complete pre-filtering!
30th September 2024
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Oase - Pre Filter Sponge - BioMaster - 60 ppi - 4x
I used them to replace the original ones that came with the filter. They work super well.