【PACKAGE INCLUDES】 20pcs filter cartridges for replacement. We suggest to change the cartridges every 1-2 weeks. You can also rinse the cartridge to prolong the serivce time.
【3-LAYER CARTRIDGES】With two layers of cotton sponges on both sides and a layer of activated carbon in the middle, brings obvious filtering effect to your tank.
【MAIN FUNCTION】Help clean water, absorb odors and discoloration & Provide clean and healthy water for your tank. You can also add other filter material to increase filter effects.
【SUITABLE RANGE】Suit for 3.5w low-water filter avaible in our store with ASIN B0BPXYMCBP and B0BPXY2ZNM for details.
