OceanMax filter bio sponges are 100 × 100 × 4cm sheets that do two jobs at once: their open structure traps debris while the surface hosts beneficial bacteria.
Cut one to fit your filter chamber or use it as an intake sponge in an aquarium or fish tank filter. Coarse PPI 10 suits pre-filtration and pond filters; finer grades catch smaller debris, and the gentle flow is safe for fry.
Good to know:
– Sheet size: 100 × 100 × 4cm — cut to fit
– Grades: PPI 10, PPI 20 and PPI 30 (pores per inch)
– Colours: plain or blue
– For aquarium, fish tank, sump and pond filters
– Rinse in tank water and reuse