RISHENG UNDERGRAVEL FILTERING BOARD

Instruction :
1. Place the filtering board into the aquarium directly onto the bottom glass panel
2. Cover the filter with washed aquarium gravel to the depth at approximately 50mm
3. Connect airline from air pump to the small tube on the filter
4. Once the aquarium is filled with water turn on the air pump and adjust the airflow to the filter

Features :
• Undergravel filter operate by gently allowing water down through the gravel under the board and expelling it near the surfaces
• Forms a false floor that allows a layer of gravel to be suspended above a water filled space
• Lay below the gravel in an aquarium to remove waste and debris from the water
• Waste removing
• The lift tube functions as an outlet that returns the filtered water.
• Better biological filtration
• Regular clean the gravel with the use of syphone gravel cleaner