Aquarium Biochemical Sponge Fish Tank Filter Practical Fish Tank Accessories Pond Culture Foam Sponge Filter Black

Product Description:Item Type:SpongeMaterial:CottonSize: cm/19.69"*12 cm/4.72"*2 cm/0.79"Features:1. High Shading: the moderate elastic density has good shading and can reduce algae breeding.2. Nitrifying: the moderate size of pores are conducive to the cultivation of high-density nitrifying .3. Filter: the biochemical cotton has the best effect on decomposing excrement and feed residue, improving water quality and reducing the mortality of fish.4. Thickened Fabric: it is durable and high water permeability, and it is more effective decomposition of impurities in water。5. Economic: compared with the common sponge, this biochemical cotton sponge is washable and can be used repeatedly.Package Include:1 x spongeNotes:1. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors.2. Due to the screen difference, the color may be a little difference from what you expect, please allow it.