Aquarium Filters
The PPI, polieter based, (blue color) is a special material for water filters for aquariums and aquariums in general, it preserves the hygiene of the fauna in this type of installations, it is a material specially manufactured not to damage at all this type of fauna, because any type of polyurethane foam could damage them irreversibly.
The foams called PPI (pores per inch), are controlled pore materials, we have 10, 20, 30 and 45 pores per inch, because depending on the type of filter, you will need one or the other.
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