Fits SUNSUN/PERFECT/GRECH/Super HW-302 /505A, Polar Aurora 265gph without UV canister filter. (Reusable after rinsed). 12xfloss filter pads (White). After 6 to 12 months’ usage, the micro holes of sponge is gradually clogged by the tiny debris, the beneficial bacteria won’t have as much living space as before.
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