500Pcs High Density Tank Filter Cotton Efficient Cleaning Yellow Water Impurity Removal Absorbs Stains Safe for Fish

Specifications :Product Name: Aquarium Water Clarifying & Filtration PadsMaterial: Non-woven fabricDimensions: 9.5 × 13 cmFunctions: Removes yellow discoloration and odors; filters impurities and supports beneficial bacteria growth.Usage: Place the pad in the filtration compartment or in any area with strong water flow/circulation. Quantity: 50 sheets or 100 sheetsPackage Includes:50 or 100 sheets * Yellow-Absorbing PaperNotes:1. Once the yellow-absorbing paper becomes saturated, simply discard it.(Saturation typically occurs within 3–5 hours.)2. Usage tends to be higher during the initial application. Start by adding 2–10 sheets; after one hour, check the results and increase the quantity as needed based on the water clarity. Once the yellow discoloration has been cleared, subsequent usage will be much more economical.(The above guidelines—including the specific quantity required—will vary depending on the volume of the aquarium and the intensity of the water's color. For reference, in my personal 30 cm tank housing a single Ranchu goldfish, I use only 2 sheets per week.)3. This product is effective at eliminating yellow discoloration, fishy odors, tannins released by driftwood, residual medications, fish food residues, and yellow powder pigments. (It is not effective against green water, cloudy water, or similar issues.)