Pawfly 4 Pack Aquarium Bio Sponge Filter Media Pad, Filter Foam Sponge Pads Cut-to-Size Foam for Fish Tank Filters Sumps Ponds Hydroponics, 6.3" x 5.5" x 0.78"

Mechanical Filtration: The aquarium bio sponge filter pads can effectively trap debris, food residue, wastes or other impurities in water. Prevent them from entering the aquarium to keep water clean

Fine Sponge Filtration: With larger contact area with water, the filter sponge pads are helpful for the accumulation of beneficial elements. Provide biological filtration to fully remove excess damaging substances

Versatile Use: Size: 6.3" x 5.5" x 0.78"; PPI: 30. The filter pad can be cut to fit and used as a pre-filter for any aquarium, such as wet or dry filters, canister filters, power filters, etc. Also work great for sumps, ponds or HMF DIY project

Reliable Material: The aquarium filter pads are made of soft and foldable foam with reticulated structure and fine air and water permeability, which can provide better flow rate of water and less chance of clog

Easy to Use: Before use, rinse the sponge pad with cool water to remove the outside dust, then cut it to the proper size and fully put it into the filter chamber. Replace it every 2 to 4 weeks to maintain a healthy water